1. Department of Urology, Beijing University of Chinese Medicine Dongzhimen Hospital, Beijing 100700, P.R. China
2. Department of Neurosurgery, Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650101, P.R. China
3. Department of Pneumology, Second Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650101, P.R. China