1. Department of Orthopaedic Surgery, University of Texas Health Science Center at Houston, Houston, TX 77054, USA
2. Center for Regenerative Sports Medicine, Steadman Philippon Research Institute, Vail, CO 81657, USA
3. Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
4. Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan
5. Department of Biochemistry and Molecular Biology, Jinan University, Guangdong, China