[1] Univ Fed Minas Gerais, Hosp Clin, Dept Cirurgia Pediat, Av Alfredo Balena 110,6 Oeste, Belo Horizonte, MG, Brazil
[2] Harvard Med Sch, Program Global Surg & Social Change, Boston, MA 02115 USA
[3] Univ Fed Sao Paulo, Escola Paulista Med, Sao Paulo, Brazil
[4] Univ Sao Paulo, Dept Cirurgia Plast, Sao Paulo, Brazil
[5] Fundacao Hosp Estado Minas Gerais, Belo Horizonte, MG, Brazil
[6] Montreal Childrens Hosp, Harvey E Beardmore Div Pediat Surg, Montreal, PQ, Canada