0120-9957 0120-9957 S0120-99572020000300319 10.22516/25007440.446 Colombia Colombia Colombia 00 09 2020 00 09 2020 35 3 319 328

1 ASGE Standards of Practice Committee 2010 71 1 1 1-9 2 2015 28 2 2 109-12 3 2015 18 4 4 244-55 4 2011 26 4 4 243-52 5 2010 72 4 4 808-16 6 ASGE Standards of Practice Committee 2012 75 3 3 467-73 7 2016 30 10 10 4613-8 8 2016 6a 1808-34 9 2017 51 8 8 728-33 10 2014 26 4 4 452-7 11 2012 2012 bcr2012007268 12 2004 328 7446 7446 983 13 2017 66 5 5 765-82 14 2005 100 2 2 295-8 15 2015 82 1 1 88-93 16 2014 29 8 8 1614-9 17 2016 95 42 42 18 2003 22 9 9 879-85 19 1995 19 2 2 156-60 20 1962 109 429-37 21 1995 108 1 1 252-75 22 1993 92 1 1 17-24 23 1970 15 9 9 803-7