[1] Univ Miami, Leonard M Miller Sch Med, Div Pediat Clin Res, Miami, FL 33101 USA
[2] Univ Miami, Leonard M Miller Sch Med, Dept Pediat, Miami, FL 33101 USA
[3] Univ Miami, Leonard M Miller Sch Med, Dept Epidemiol & Publ Hlth, Miami, FL 33101 USA
[4] Surg Review Corp, Raleigh, NC USA
[5] Nemours Alfred I DuPont Hosp Children, Dept Surg, Wilmington, DE USA
[6] Ohio State Univ, Coll Med, Dept Pediat Surg, Nationwide Childrens Hosp, Columbus, OH 43210 USA
[7] Univ Miami, Leonard M Miller Sch Med, Dept Surg, Miami, FL 33101 USA