gastric acid secretion basally and in response to intragastric meat extract instillation or to tetragastrin , and circulating gastrin concentration basally and after meat extract stimulation were studied in 67 patients with gastroduodenal ulcer , 30 patients after highly selective vagotomy or selective vagotomy for duodenal ulcer , 12 patients after antrectomy for or gastric ulcer and 10 control subjects .
C0039659
tetragastrin
C0017151
gastrin