1. College of Life Science Sichuan Normal University 610101 Chengdu Sichuan P. R. China
2. Department of Orthopedics and Traumatology of Traditional Chinese Medicine Sichuan 2nd Hospital of Traditional Chinese Medicine 610031 Chengdu Sichuan P. R. China
3. Department of Geriatrics Sichuan 2nd Hospital of Traditional Chinese Medicine 610031 Chengdu Sichuan P. R. China