0003-3170 0003-3170 S0003-31702021000400009 10.20960/angiologia.00212 Spain 00 08 2021 00 08 2021 73 4 210 212 1 1993 18 3 3 341-8 2 1985 120 3 3 289-95 3 1952 135 3 3 332-6