1. Andrology Laboratory, Hunan University of Chinese Medicine, Changsha, Hunan 410208, P.R. China
2. Dermatology Department, The First Hospital of Hunan University of Chinese Medicine, Changsha, Hunan 410021, P.R. China
3. Andrology Clinic, Shenzhen Baoan Hospital of Traditional Chinese Medicine, Shenzhen, Guangdong 518133, P.R. China
4. Medical Basic Teaching Experiment Center, Hunan University of Chinese Medicine, Changsha, Hunan 410208, P.R. China