1. Department of Preventive Medicine, School of Public Health, Hubei University of Medicine, Shiyan, Hubei 050011, P.R. China
2. Department of Laboratory Medicine, The First People's Hospital of Yichang, The People's Hospital of China Three Gorges University, Yichang, Hubei 443000, P.R. China
3. Department of Urology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330000, P.R. China