0003-3170 0003-3170 S0003-31702021000100037 10.20960/angiologia.00222 Ecuador Ecuador 00 02 2021 00 02 2021 73 1 37 40

1 2011 9 2 2011 45 1 1 5-14 3 2020 142 2 2 114-28 4 1988 8 3 3 306-12