1. Department of Social Medicine, School of Health Management, Harbin Medical University, Harbin, China
2. Department of Health Economics, School of Health Management, Harbin Medical University, Harbin, China
3. Department of Sexual Health Education, School of Health Management, Harbin Medical University, Harbin, China
4. Department of Humanities and Social Sciences, Harbin Medical University, Daqing, China
5. Chengyang People’s Hospital, Qingdao, China