Classification and grading of gastritis. The updated Sydney System. International Workshop on the Histopathology of Gastritis, Houston 1994.
Am J Surg Pathol. 1996 Oct;20(10):1161-81. doi: 10.1097/00000478-199610000-00001.
Am J Surg Pathol. 1996.
PMID: 8827022
Review.