1. Shandong The First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
2. Center for Regenerative Sports Medicine, Steadman Philippon Research Institute, Vail, CO 81657, USA
3. University of Texas Health Science Center at Houston, Houston, TX 77030, USA
4. Department of Biochemistry, Molecular Biology and Biophysics, Institute on the Biology of Aging and Metabolism, University of Minnesota, Minneapolis, MN 55455, USA