Brief Article
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World J Gastroenterol. Jan 21, 2013; 19(3): 347-354
Published online Jan 21, 2013. doi: 10.3748/wjg.v19.i3.347
Epidemiology of perforated peptic ulcer: Age- and gender-adjusted analysis of incidence and mortality
Kenneth Thorsen, Jon Arne Søreide, Jan Terje Kvaløy, Tom Glomsaker, Kjetil Søreide
Kenneth Thorsen, Jon Arne Søreide, Tom Glomsaker, Kjetil Søreide, Department of Surgery, Stavanger University Hospital, N-4068 Stavanger, Norway
Jan Terje Kvaløy, Department of Mathematics and Natural Science, University of Stavanger, 4036 Stavanger, Norway
Kenneth Thorsen, Jon Arne Søreide, Kjetil Søreide, Department of Surgical Science, University of Bergen, 5020 Bergen, Norway
Author contributions: Thorsen K contributed to conception, design, acquisition of data, analysis and interpretation of data, drafting the manuscript, evising it critically for important intellectual content and final approval of the version to be published; Søreide JA, Kvaløy JT and Glomsaker T contributed to analysis and interpretation of data, drafting the manuscript, revising it critically for important intellectual content and final approval of the version to be published; Søreide K contributed to conception and design, analysis and interpretation of data, drafting the manuscript, revising it critically for important intellectual content and final approval of the version to be published.
Correspondence to: Kjetil Søreide, MD, PhD, Professor of Surgery, Department of Surgery, Stavanger University Hospital, POB 8100, N-4068 Stavanger, Norway. ksoreide@mac.com
Telephone: +47-5151-8330 Fax: +47-5151-9919
Received: October 24, 2012
Revised: December 12, 2012
Accepted: December 20, 2012
Published online: January 21, 2013
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