1. Sports Medicine Division, Institute of Orthopedics and Traumatology, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil.
2. Hospital Sírio-Libanês, São Paulo, Brazil.
3. Department of Orthopedic Surgery, Center for Cartilage Repair and Sports Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
4. Hospital for Special Surgery (HSS), New York, New York.