1. Department of Urology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, P. R. China
2. Department of Urology, Affiliated Hangzhou First People’s Hospital, Zhejiang University School of Medicine, Hangzhou, P. R. China
3. Affiliated Hangzhou First People’s Hospital, Nanjing Medical University, Hangzhou, P. R. China
4. Institute of Information Resource, Zhejiang University of Technology, Hangzhou, P. R. China
5. Library, Zhejiang University of Technology, Hangzhou, P. R. China