Helicobacter (Campylobacter) pylori Infestation and the Development and Progression of Chronic Gastritis: Results of Long-term Follow-up Examinations of a Random Sample
K. Villako, H. Maards, R. Tammur, R. Keevallik, M. Peetsalu, P. Sipponen, M. Kekki, M. Siurala
Tartu State University USSR; Second Department of Medicine, University of Helsinki, Helsinki, Finland, Jorvi Hospital, Espoo, Finland