1. Medical Records Room, Jinan Authority Hospital, Jinan, Shandong, China
2. Community Health Service Center, Qingdao, Shandong, China
3. Cadre Ward Section 1, The 960th Hospital of the People’s Liberation Army, Jinan, Shandong, China
4. Health Section II, Weifang People’s Hospital, Weifang, Shandong, China