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Excerpt from Carcinogenesis Abstracts, Vol. 10: July 1971 Seven of 50 rats developed gastric adenocarcinomas whereas none of the controls showed carcinomas. It was concluded that the contact of the chemical carcinogen -daaf with injured, healing gastric mucosa enhanced the malignant transformation of gastric cellular elements. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.