1. Cartilage Repair Center, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
2. Instituto de Ortopedia e Traumatologia, Hospital das Clinicas, HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil
3. Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
4. Hospital for Special Surgery, New York, New York, USA