1. Cartilage Biology and Orthopedics Branch, National Institute of Arthritis, and Musculoskeletal and Skin Diseases, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland.
2. Graduate Program of Cell and Tissue Engineering, Thomas Jefferson University, Philadelphia, Pennsylvania.
3. These authors contributed equally to this work.
4. Department of Orthopedic Surgery, George Washington University Medical Center, Washington, D.C.
5. Division of Bioengineering and Physical Science, Office of Research Services, National Institutes of Health, Bethesda, Maryland.
6. Department of Orthopedic Surgery, König Ludwig Haus, Julius Maximilians University, Würzburg, Germany.
7. Cartilage Biology and Orthopedics Branch, National Institute of ArDepartment of Orthopedic Surgery, George Washington University Medical Center, Washington, D.C.thritis, and Musculoskeletal and Skin Diseases, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland.