[1] Oregon Hlth & Sci Univ, Div Pediat Surg, Portland, OR 97239 USA
[2] Yale Univ, Sch Med, New Haven, CT USA
[3] MyungSung Med Coll, Addis Ababa, Ethiopia
[4] Ahmadu Bello Univ, Zaria, Nigeria
[5] Nairobi Hosp, Nairobi, Kenya
[6] Univ Toronto, Toronto, ON, Canada
[7] Univ Malawi, Coll Med, Blantyre, Malawi
[8] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA
[9] Tanta Univ, Tanta, Egypt
[10] Albany Med Ctr, Albany, NY USA
[11] AIC Kijabe Hosp, Kijabe, Kenya
[12] Univ Ghana, Sch Med & Dent, Accra, Ghana
[13] Univ Oxford, Oxford, England
[14] Oregon Hlth & Sci Univ, Portland, OR 97239 USA
[15] Maine Med Ctr, Portland, ME 04102 USA
[16] Nationwide Childrens Hosp, Columbus, OH USA
[17] Texas Tech Univ, Hlth Sci Ctr El Paso, El Paso, TX USA
[18] Norwich & Norfolk Univ Hosp, Norwich, Norfolk, England
[19] Univ Ilorin, Coll Hlth Sci, Ilorin, Nigeria
[20] Women & Childrens Hosp Buffalo, Buffalo, NY USA
[21] Mulago Hosp, Kampala, Uganda