Gastric cancer, cytotoxin-associated gene A–positive Helicobacter pylori, and serum pepsinogens: An international study Penelope M. Webb, Jean E. Crabtree, David Forman Gastroenterology Volume 116, Issue 2, Pages 269-276 (February 1999) DOI: 10.1016/S0016-5085(99)70122-8 Copyright © 1999 American Gastroenterological Association Terms and Conditions
Fig. 1 Mean PgA/PgC ratio, adjusted for age group and sex, by study center. ▨, H. pylori negative; ■, H. pylori positive/CagA negative; □, H. pylori positive/CagA positive. Gastroenterology 1999 116, 269-276DOI: (10.1016/S0016-5085(99)70122-8) Copyright © 1999 American Gastroenterological Association Terms and Conditions