0003-3170 0003-3170 S0003-31702021000100033 10.20960/angiologia.00171 Ecuador 00 02 2021 00 02 2021 73 1 33 36

1 2002 82 1 1 221-35 2 2007 46 6 6 1227-33 3 2011 23 2 2 90-7 4 2007 65 4 4 691-705 5 2010 52 11 11 1011-6 6 2015 39 6 6 1363-72 7 2003 38 2 2 257-62