1. School of Public health, Qingdao University, Qingdao 266071, China
2. . Hedong District Center for Disease Control and Prevention, Tianjin 300171, China
3. Institute of Nutrition & Health, Qingdao University, Qingdao 266071, China
4. . Qingdao Eighth People’s Hospital, Qingdao 266041, China
5. . The Affiliated Hospital of Qingdao University, Qingdao 266000, China