1. Department of Orthopaedic SurgeryBoston Children's Hospital, Harvard Medical SchoolBostonMassachusetts
2. Department of OrthopaedicsBeth Israel Deaconess Medical CenterBostonMassachusetts
3. Department of Biomechanics, Medicine, and Rehabilitation of the Locomotor SystemRibeirao Preto Medical School, University of Sao PauloRibeirao PretoSao PauloBrazil