[1] City Childrens Hosp, Dept Pediat Surg, 15 Vo Tran Chi, Ho Chi Minh City, Vietnam
[2] Belgique Univ Libre Bruxelles ULB, Hop Univ Enfants Reine Fabiola, Brussels, Belgium
[3] Belgique Univ Libre Bruxelles ULB, Hop Univ Enfants Reine Fabiola, Dept Gastroenterol, Brussels, Belgium
[4] UCL, Inst Rech Expt & Clin, Fac Sante Publ, Brussels, Belgium
[5] ULB, Lab Pediat, Brussels, Belgium