[1] Univ Fed Rio de Janeiro, Antonio Pedro Univ Hosp, BR-21941 Rio De Janeiro, Brazil
[2] Univ Fed Rio de Janeiro, Sch Med, Hosp Clementino Fraga Filho, Trauma Orthopaed Serv, BR-21941 Rio De Janeiro, Brazil
[3] Childrens Hosp, Alfred I Dupont Inst, EUA, Wilmington, DE USA