1. Center for Cartilage Repair, Division of Sports Medicine, Department of Orthopaedic Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
2. Instituto de Ortopedia e Traumatologia, Hospital das Clinicas, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
3. Hospital for Special Surgery, New York, NY, USA