Publication Type: Journal Article Authors: van Soest, E. M.; Valkhoff, V. E.; Mazzaglia, G.; Schade, R.; Molokhia, M.; Goldstein, J. L.; Hernandez-Diaz, S.; Trifiro, G.; Dieleman, J. P.; Kuipers, E. J.; Sturkenboom, M. C. Source: Gut, Volume 60, Number 12, p.1650-9 (2011)