0120-9957 0120-9957 S0120-99572019000200144 10.22516/25007440.393 Colombia Colombia Colombia Colombia Colombia 00 06 2019 00 06 2019 34 2 144 151

1 2006 63 7 7 894-909 2 ASGE Standards of PracticeCommittee 2015 81 4 4 781-94 3 2013 369 12 12 1095-105 4 2012 366 687-96 5 International Agency for Research on Cancer World Health Organization 2012 6 2013 67 2 2 76-81 7 2009 66 1 1 27-37 8 2010 72 4 4 686-92 9 2009 69 3 3 620-5 10 2015 25 2 2 183-97 11 2012 104 8 8 426-31 12 2010 33 1 1 33-42 13 2009 101 2 2 107-12 14 2012 44 4 4 444-51 15 2015 149 1 1 79-88 16 2014 9 6 6 17 2005 20 4 4 60-71 18 2013 42 3 3 577-98 19 2011 73 6 6 1240-5 20 2014 26 6 6 731-6 21 2003 58 1 1 36-40 22 2005 62 2 2 213-8 23 1994 37 3 3 229-33 24 1998 47 2 2 167-71