[1] UMC Utrecht, Dept Pediat Surg, Utrecht, Netherlands
[2] Bambino Gesu Pediat Hosp, Dept Med & Surg Neonatol, Newborn Surg Unit, Res Inst Rome, Rome, Italy
[3] Univ Montreal, Dept Pediat, Montreal, PQ, Canada
[4] CHRU Lille, Hop J de Flandre, Pole Enfant, Lille, France
[5] Harvard Med Sch, Boston Childrens Hosp, Dept Pediat Surg, Boston, MA USA
[6] McGill Univ, Montreal Childrens Hosp, Montreal, PQ, Canada
[7] JP Garrahan Natl Childrens Hosp, Dept Pediat Surg, Buenos Aires, DF, Argentina
[8] Robert Debre Univ Hosp, AP HP, Dept Pediat Surg, Paris, France
[9] Jeanne de Flandre Hosp, Dept Surg, Lille, France
[10] Royal Childrens Hosp, Dept Pediat Surg, Melbourne, Vic, Australia