The occurrence of a duodenal or gastric ulcer in two different populations living in the same region: a cross-sectional endoscopical study in consecutive patients

Netherlands Journal of Medicine - Tập 59 - Trang 209-212 - 2001
R.J.L.F Loffeld1, A.B.M.M van der Putten1
1Department of Internal Medicine, De Heel Zaans Medisch Centrum, PO Box 210, 1500 EE Zaandam, The Netherlands