“…Another article on pepsin secretion studies is concerned with the effect of vagal resection on patients with duodenal ulcer (8). The authors note that it is generally accepted that most individuals who have undergone a vagotomy for duodenal ulcer have at least a temporary decrease in the amount of gastric secretion and in the degree of free hydrochloric acid, but that there are no known studies of the effect of this operation on pepsin secretion.…”