1 Department of Public Health, Erasmus Medical Center University, Rotterdam, The Netherlands
2 Division of Gastroenterology, Department of Medicine, University of Michigan, Ann Arbor, Michigan, USA
3 Eindhoven Cancer Registry, Department of Research, Eindhoven, The Netherlands
4 Cancer and Environmental Epidemiology Area, National Centre for Epidemiology, Carlos III Institute of Health, Madrid, Spain
5 CIBER in Epidemiology and Public Health, Barcelona, Spain
6 Division of Gastroenterology, Department of Medicine, University of Washington, Seattle, Washington, USA
Correspondence: S. Kroep, Department of Public Health, Erasmus Medical Center University, Room Ae-131, PO Box 2040, 3000 CA, Rotterdam, The Netherlands. E-mail: [email protected]
SUPPLEMENTARY MATERIAL accompanies this paper at http://links.lww.com/AJG/A883
Received 29 May 2013; accepted 18 September 2013
published online 17 December 2013