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Cámara, Rafael J A; Ziegler, Roger; Begré, Stefan; Schoepfer, Alain M; von Känel, Roland (2009). The role of psychological stress in inflammatory bowel disease: quality assessment of methods of 18 prospective studies and suggestions for future research. Digestion, 80(2), pp. 129-39. Basel: Karger 10.1159/000226087
