Environmental risk factors in paediatric inflammatory bowel diseases: a population based case control study. - Baron, S.; Turck, D.; Leplat, C.; Merle, V.; Gower-Rousseau, C.; Marti, R.; Yzet, T.; Lerebours, E.; Dupas, J-L.; Debeugny, S.; Solomez, J-L.; Cortot, A.; et al. (Gut (0017-5749), 2005)