TY  - JOUR 
T1  - Portal fibrosis and schistosomal portal hypertension: what is the best strategy for primary and secondary prevention of hemorrhage from esophageal varices
JO  - Arquivos de Gastroenterologia
A1  - Bittencourt, Paulo L.
SN  - 0004-2803
UL  - 10.1590/S0004-28032003000100001
VL  - 40 
Y1  - 2003
PB  - Brasil 
ER  -