Wójtowicz-Chomicz K, Kowal M, Liga-Car A, Borzęcki A. Analysis of causes for chronic gastric and duodenal ulcer disease prevalence among patients hispitalized in Regional Hospital in Zamość. Pol J Public Health. 2009;119(1):71-73. Accessed August 7, 2025. https://czasopisma.umlub.pl/pjph/article/view/2205