<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0123-9015</journal-id>
<journal-title><![CDATA[Revista Colombiana de Cancerología]]></journal-title>
<abbrev-journal-title><![CDATA[rev.colomb.cancerol.]]></abbrev-journal-title>
<issn>0123-9015</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Cancerología E.S.E.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0123-90152020000300124</article-id>
<article-id pub-id-type="doi">10.35509/01239015.94</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Prevalência de tejido mamario denso en una población de Bucaramanga, Colombia]]></article-title>
<article-title xml:lang="en"><![CDATA[Prevalence of breast dense in a population in Bucaramanga, Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Baquero-Serrano]]></surname>
<given-names><![CDATA[Alejandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lopez-Martinez]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vera-Campos]]></surname>
<given-names><![CDATA[Silvia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosales-Rueda]]></surname>
<given-names><![CDATA[Sergio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jaramillo-Botero]]></surname>
<given-names><![CDATA[Natalia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ochoa-Vera]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Bucaramanga - UNAB Facultad de Ciencias de la Salud Departamento Radiología e Imágenes Diagnósticas]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Industrial de Santander - UIS Facultad de Ciencias de la Salud ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Pontificia Universidad Javeriana Facultad de Ciencias de la Salud ]]></institution>
<addr-line><![CDATA[Bogotá, D. C. ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Clínica FOSCAL Servicio de Radiología Departamento de Radiología e Imágenes Diagnósticas]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,FOSCAL Grupo de Investigaciones Clínicas ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<volume>24</volume>
<numero>3</numero>
<fpage>124</fpage>
<lpage>129</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0123-90152020000300124&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0123-90152020000300124&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0123-90152020000300124&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Establecer la prevalencia de mujeres mayores de 50 años con mamas densas estudiadas por mamografía en el área de Bucaramanga.  Métodos: Se realizó un estudio descriptivo retrospectivo durante el periodo comprendido entre enero de 2014 y agosto de 2015, en el que se revisaron 10.110 mamografías de pacientes mayores de 50 años. Posteriormente, se hizo una revisión de la literatura en las principales bases de datos.  Resultados: De las 10.110 mamografías realizadas, 4.448 fueron encontradas como positivas para mama densa. De estas, el 39,69% correspondió a tejido mamario heterogéneamente denso y el 4,29%, a tejido mamario extremadamente denso, para un total de 43,9% de los casos estudiados.  Conclusión: La densidad mamaria es un factor de riesgo independiente de cáncer de mama, considerado de mediana importancia frente a otros factores. A medida que incrementa la densidad mamaria, se genera la superposición del tejido mamario radio-opaco que puede ocultar y llegar a retardar el diagnóstico de un cáncer subyacente. Dada la alta prevalencia de tejido mamario denso encontrado en la población estudiada, se sugiere complementar el tamizaje con otros métodos de imágenes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: To establish the prevalence of dense breast tissue in a group of women aged over 50 years, who were studied with mammography in the city of Bucaramanga (Colombia).  Methods: A retrospective descriptive study was conducted from January 2014 to August 2015; 10.110 mammograms of patients aged over 50 years were reviewed. Subsequently, a review of the literature in the main databases was made.  Results: From 10.110 mammograms that were performed, 4.448 were found to be positive for dense breast tissue. 39,69% had heterogeneously dense breast tissue, and 4,29% extremely dense breast tissue, for a total result of 43,9% patients with positive dense breast tissue.  Conclusion: Breast density is an independent risk factor for breast cancer, being of medium importance compared with other factors. As the breast density increases, the overlap of the radiopaque breast tissue that can hide and delay the diagnosis of an underlying cancer is generated. The high prevalence of dense breast tissue that we found in this population suggests the need of complementing screening with other imaging methods.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Mammography]]></kwd>
<kwd lng="en"><![CDATA[Breast]]></kwd>
<kwd lng="en"><![CDATA[Diagnosis]]></kwd>
<kwd lng="en"><![CDATA[Mass Screening]]></kwd>
<kwd lng="es"><![CDATA[Mamografía]]></kwd>
<kwd lng="es"><![CDATA[Mama]]></kwd>
<kwd lng="es"><![CDATA[Diagnóstico]]></kwd>
<kwd lng="es"><![CDATA[Tamizaje masivo.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Winkler]]></surname>
<given-names><![CDATA[NS]]></given-names>
</name>
<name>
<surname><![CDATA[Raza]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Mackesy]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Birdwell]]></surname>
<given-names><![CDATA[RL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Breast density: clinical implications and assessment methods]]></article-title>
<source><![CDATA[Radiographics]]></source>
<year>2015</year>
<volume>35</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>316-24</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Boyd]]></surname>
<given-names><![CDATA[NF]]></given-names>
</name>
<name>
<surname><![CDATA[Martin]]></surname>
<given-names><![CDATA[LJ]]></given-names>
</name>
<name>
<surname><![CDATA[Yaffe]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Minkin]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mammographic density and breast cancer risk: current understanding and future prospects]]></article-title>
<source><![CDATA[Breast Cancer Res]]></source>
<year>2011</year>
<volume>13</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>223</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Boyd]]></surname>
<given-names><![CDATA[NF]]></given-names>
</name>
<name>
<surname><![CDATA[Guo]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Martin]]></surname>
<given-names><![CDATA[LJ]]></given-names>
</name>
<name>
<surname><![CDATA[Sun]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Stone]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Fishell]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mammographic density and the risk and detection of breast cancer]]></article-title>
<source><![CDATA[N Engl J Med]]></source>
<year>2007</year>
<volume>356</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>227-36</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nazary]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Mukherjee]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[An overview of mammographic density and its association with breast cancer]]></article-title>
<source><![CDATA[Breast cancer]]></source>
<year>2018</year>
<volume>25</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>259-67</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hooley]]></surname>
<given-names><![CDATA[RJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Breast density legislation and clinical evidence]]></article-title>
<source><![CDATA[Radiol Clin North Am]]></source>
<year>2017</year>
<volume>55</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>513-26</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wolfe]]></surname>
<given-names><![CDATA[JN]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Risk for breast cancer development determined by mammographic parenchymal pattern]]></article-title>
<source><![CDATA[Cancer]]></source>
<year>1976</year>
<volume>37</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>2486-92</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wolfe]]></surname>
<given-names><![CDATA[JN]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Breast patterns as an index of risk for developing breast cancer]]></article-title>
<source><![CDATA[AJR Am J Roentgenol]]></source>
<year>1976</year>
<volume>126</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1130-7</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Freer]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mammographic dreast density: impact on breast cancer risk and implications for screening]]></article-title>
<source><![CDATA[Radiographics]]></source>
<year>2015</year>
<volume>35</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>302-15</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bae]]></surname>
<given-names><![CDATA[MS]]></given-names>
</name>
<name>
<surname><![CDATA[Moon]]></surname>
<given-names><![CDATA[WK]]></given-names>
</name>
<name>
<surname><![CDATA[Chang]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Koo]]></surname>
<given-names><![CDATA[HR]]></given-names>
</name>
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[WH]]></given-names>
</name>
<name>
<surname><![CDATA[Cho]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Breast cancer detected with screening US: reasons for nondetection at mammography]]></article-title>
<source><![CDATA[Radiology]]></source>
<year>2014</year>
<volume>270</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>369-77</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Chang]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Shin]]></surname>
<given-names><![CDATA[SU]]></given-names>
</name>
<name>
<surname><![CDATA[Chu]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
<name>
<surname><![CDATA[Cho]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Noh]]></surname>
<given-names><![CDATA[DY]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Detection of noncalcified breast cancer in patients with extremely dense breasts using digital breast tomosynthesis compared with full-field digital mammography]]></article-title>
<source><![CDATA[Br J Radiol]]></source>
<year>2019</year>
<volume>92</volume>
<numero>1093</numero>
<issue>1093</issue>
<page-range>20180101</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dehkordy]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Carlos]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Dense breast legislation in the United States: state of the states]]></article-title>
<source><![CDATA[J Am Coll Radiol]]></source>
<year>2013</year>
<volume>10</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>899-902</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Horny]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Cohen]]></surname>
<given-names><![CDATA[AB]]></given-names>
</name>
<name>
<surname><![CDATA[Duszak Jr]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Christiansen]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
<name>
<surname><![CDATA[Shwartz]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Burgess Jr]]></surname>
<given-names><![CDATA[JF]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Dense breast notification laws: impact on downstream imaging after screening mammography]]></article-title>
<source><![CDATA[Med Care Res Rev]]></source>
<year>2020</year>
<volume>77</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>143-54</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[McCormack]]></surname>
<given-names><![CDATA[VA]]></given-names>
</name>
<name>
<surname><![CDATA[Dos Santos Silva]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Breast density and parenchymal patterns as markers of breast cancer risk: a meta-analysis]]></article-title>
<source><![CDATA[Cancer Epidemiol Biomarkers Prev]]></source>
<year>2006</year>
<volume>15</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1159-69</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Melnikow]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Fenton]]></surname>
<given-names><![CDATA[JJ]]></given-names>
</name>
<name>
<surname><![CDATA[Whitlock]]></surname>
<given-names><![CDATA[EP]]></given-names>
</name>
<name>
<surname><![CDATA[Miglioretti]]></surname>
<given-names><![CDATA[DL]]></given-names>
</name>
<name>
<surname><![CDATA[Weyrich]]></surname>
<given-names><![CDATA[MS]]></given-names>
</name>
<name>
<surname><![CDATA[Thompson]]></surname>
<given-names><![CDATA[JH]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Supplemental screening for breast cancer in women with dense breasts: a systematic review for the U.S. Preventive Service Task Force]]></article-title>
<source><![CDATA[Ann Intern Med]]></source>
<year>2016</year>
<volume>164</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>268-78</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carney]]></surname>
<given-names><![CDATA[PA]]></given-names>
</name>
<name>
<surname><![CDATA[Miglioretti]]></surname>
<given-names><![CDATA[DL]]></given-names>
</name>
<name>
<surname><![CDATA[Yankaskas]]></surname>
<given-names><![CDATA[BC]]></given-names>
</name>
<name>
<surname><![CDATA[Kerlikowske]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Rosenberg]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Rutter]]></surname>
<given-names><![CDATA[CM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Individual and combined effects of age, breast density, and hormone replacement therapy use on the accuracy of screening mammography]]></article-title>
<source><![CDATA[Ann Intern Med]]></source>
<year>2003</year>
<volume>138</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>168-75</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kerlikowske]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Hubbard]]></surname>
<given-names><![CDATA[RA]]></given-names>
</name>
<name>
<surname><![CDATA[Miglioretti]]></surname>
<given-names><![CDATA[DL]]></given-names>
</name>
<name>
<surname><![CDATA[Geller]]></surname>
<given-names><![CDATA[BM]]></given-names>
</name>
<name>
<surname><![CDATA[Yankaskas]]></surname>
<given-names><![CDATA[BC]]></given-names>
</name>
<name>
<surname><![CDATA[Lehman]]></surname>
<given-names><![CDATA[CD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparative effectiveness of digital versus film-screen mammography in community practice in the United States: a cohort study]]></article-title>
<source><![CDATA[Ann Intern Med]]></source>
<year>2011</year>
<volume>155</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>493-502</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carreira Gómez]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
<name>
<surname><![CDATA[Estrada Blan]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mama densa, ¿qué debemos saber? Implicaciones en el cribado]]></article-title>
<source><![CDATA[Radiología]]></source>
<year>2016</year>
<volume>58</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>421-6</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Noroozian]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Hadjiiski]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Rahnama-Moghadam]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Klein]]></surname>
<given-names><![CDATA[KA]]></given-names>
</name>
<name>
<surname><![CDATA[Jeffries]]></surname>
<given-names><![CDATA[DO]]></given-names>
</name>
<name>
<surname><![CDATA[Pinsky]]></surname>
<given-names><![CDATA[RW]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Digital breast tomosynthesis is comparable to mammographic spot views for mass characterization]]></article-title>
<source><![CDATA[Radiology]]></source>
<year>2012</year>
<volume>262</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>61-8</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Destounis]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Role of Digital breast tomosynthesis in screening and diagnostic breast imaging]]></article-title>
<source><![CDATA[Semin Ultrasound CT MRI]]></source>
<year>2018</year>
<volume>39</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>35-44</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jo]]></surname>
<given-names><![CDATA[HM]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[EH]]></given-names>
</name>
<name>
<surname><![CDATA[Ko]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Kang]]></surname>
<given-names><![CDATA[BJ]]></given-names>
</name>
<name>
<surname><![CDATA[Cha]]></surname>
<given-names><![CDATA[JH]]></given-names>
</name>
<name>
<surname><![CDATA[Yi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Prevalence of women with dense breasts in Korea: results from a nationwide cross-sectional study]]></article-title>
<source><![CDATA[Cancer Res Treat]]></source>
<year>2019</year>
<volume>51</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>1295-301</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
