TY - JOUR AN - 10 AU - Monteiro,L. AU - de Mascarel,A. AU - Sarrasqueta,A.M. TI - Diagnosis of Helicobacter pylori infection: noninvasive methods compared to invasive methods and evaluation of two new tests. JO - Am J Gastroenterol PY - 2001 VL - 96 SP - 353-358 M2 - 353 DO - 10.1111/j.1572-0241.2001.03518.x ER -