[1] Massachusetts Gen Hosp, Dept Surg, 55 Fruit St,Ste GRB 425, Boston, MA 02114 USA
[2] Harvard Med Sch, Boston, MA USA
[3] Massachusetts Gen Hosp, Dept Surg, MassGen Hosp Children, Boston, MA 02114 USA
[4] Massachusetts Gen Hosp, Codman Ctr Clin Effectiveness Surg, Boston, MA 02114 USA
[5] Harvard Med Sch, Massachusetts Gen Hosp, Div Endocrinol Neuroendocrinol, Weight Ctr,Dept Med, Boston, MA USA
[6] Harvard Med Sch, Massachusetts Gen Hosp, Div Endocrinol, Weight Ctr,Dept Pediat, Boston, MA USA
[7] Stanford Univ, Sch Med, Stanford, CA 94305 USA
[8] Lucille Packard Childrens Hosp, Dept Surg, Palo Alto, CA USA
[9] Lucille Packard Childrens Hosp, Dept Pediat Surg, Palo Alto, CA USA