The clinical role of stool test (HpSA) in noninvasive diagnosis of Helicobacter pylori infection - VAİRA, Dino; Ricci, Chiara; ACCİARDİ, Carmela; Gatta, Luigi; BERARDİ, Sonia; MİGLİOLİ, Mario (Turkish Journal of Gastroenterology, 2000)