[1] Lille Univ, Jeanne Flandre Childrens Hosp, Reference Ctr Congenital & Malformat Esophageal Di, Dept Pediat,Div Gastroenterol Hepatol & Nutr,Fac M, Lille, France
[2] Data Management Maison Reg Rech Clin Univ Hosp Lil, SEED, Stat, Evaluat,Econ,France Hlth Stat, Lille, France
[3] Univ Hosp Lille, Dept Epidemiol & Publ Hlth, France Publ Hlth, Lille, France
[4] Lille Univ, Jeanne Flandre Childrens Hosp, Reference Ctr Congenital & Malformat Esophageal Di, Dept Pediat,Div Gastroenterol Hepatol & Nutr,Fac M, 1 av Eugene Avinee 59037, F-59000 Lille, France