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APA Citation
Parente, F., Lazzaroni, M., Sangaletti, O., Baroni, S., & Bianchi Porro, G. (1985). cigarette smoking, gastric acid secretion, and serum pepsinogen I concentrations in duodenal ulcer patients.. Gut, 26(12), 1327–1332. http://access.bl.uk/ark:/81055/vdc_100137788802.0x000045