1. Graduate Student Affairs Office, the First Affiliated Hospital of Anhui Medical University, Hefei , Anhui, China.
2. Department of Health Services Management, School of Health Services Management, Anhui Medical University, Hefei, Anhui, China.
3. Galactophore Oncology Center Hefei Cancer Hospital, Chinese Academy of Sciences, Hefei, Anhui, China.
4. Science Island Branch, Graduate School of University of Science and Technology of China, Hefei, Anhui, China.
5. School of Public Health, Anhui Medical University, Hefei, Anhui, China.