THE PREVALENCE OF HELICOBACTER PYLORI IN PATTENTS WITH UPPER GASTROINTESTINAL COMPLAINTS - ÖZDEN, Ali; Ekinci, Cemil; Dumlu, Şükrü; TUNÇ, Mustafa; DÖNDERICI, Ömer; Selvi, Eyüp; UZUNALİMOĞLU, Özden (Turkish Journal of Gastroenterology, 1992)