1. Guangxi Medical University, Nanning, Guangxi, People's Republic of China
2. National Science Library, Chinese Academy of Sciences, Beijing, People's Republic of China
3. Department of Information Resources Management, School of Economics and Management, University of Chinese Academy of Sciences, Beijing, People's Republic of China
4. School of Information and Management, Guangxi Medical University, Nanning, Guangxi, People's Republic of China
5. School of Public Health, Guilin Medical University, Guilin, Guangxi, People's Republic of China
6. The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, Guangxi, People's Republic of China