1. Department of Endocrinology, Metabolism and Gerontology, Seventh People's Hospital of Chengdu, Chengdu, Sichuan Province, P.R. China.
2. Department of Neurology, Hanyuan People's Hospital, Yaan, Sichuan Province, P.R. China.
3. Department of Neurology, Seventh People's Hospital of Chengdu, Chengdu, Sichuan Province, P.R. China.