<?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>0120-3347</journal-id>
<journal-title><![CDATA[Colombian Journal of Anestesiology]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. colomb. anestesiol.]]></abbrev-journal-title>
<issn>0120-3347</issn>
<publisher>
<publisher-name><![CDATA[SCARE-Sociedad Colombiana de Anestesiología y Reanimación]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-33472021000300701</article-id>
<article-id pub-id-type="doi">10.5554/22562087.e982</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Subarachnoid opioids for cesarean section. Letter to the Editor]]></article-title>
<article-title xml:lang="es"><![CDATA[Opioides subaracnoideos en cesárea. Carta al editor]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sotelo Ciudad]]></surname>
<given-names><![CDATA[Carlos Wenceslao]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Cesar Vallejo  ]]></institution>
<addr-line><![CDATA[Trujillo ]]></addr-line>
<country>Peru</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<volume>49</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-33472021000300701&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-33472021000300701&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-33472021000300701&amp;lng=en&amp;nrm=iso"></self-uri></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[Osorio Gutierrez]]></surname>
<given-names><![CDATA[CI]]></given-names>
</name>
<name>
<surname><![CDATA[Ortiz Gómez]]></surname>
<given-names><![CDATA[GA]]></given-names>
</name>
<name>
<surname><![CDATA[Valencia]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Arango]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparación de mezcla de opioides subaracnoideos para cesárea. Estudio observacional]]></article-title>
<source><![CDATA[Colombian Journal of Anesthesiology]]></source>
<year>2021</year>
<volume>49</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cochaud]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Analgesia para labor de parto]]></article-title>
<source><![CDATA[Revista Médica de Costa Rica y Centroamérica]]></source>
<year>2016</year>
<volume>LXXI</volume>
<numero>616</numero>
<issue>616</issue>
<page-range>561-7</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="">
<collab>Ministerio de Sanidad, Política Social e Igualdad</collab>
<source><![CDATA[Ficha técnica de hidromorfona]]></source>
<year>2018</year>
<publisher-loc><![CDATA[Madrid ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cosgrave]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Shanahan]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<source><![CDATA[Opioides intratecales. Sociedad Venezolana de Anestesiología]]></source>
<year>2017</year>
</nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Administración intratecal en dosis mínima de morfina para el manejo del dolor postquirúrgico en cesárea]]></article-title>
<source><![CDATA[Anestesia en México]]></source>
<year>2018</year>
<volume>30</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>38-46</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
