1. Department of Epidemiology and Health StatisticsMedical College, Qingdao University Qingdao China
2. Department of Chronic Disease, Qingdao Centers for Disease Control and Prevention Qingdao China
3. Department of Epidemiology, Qingdao Institute for Prevention Medicine Qingdao China
4. Department of Chronic Disease, Huangdao Centers for Disease Control and Prevention Qingdao China
5. Department of Endocrinology, Qingdao Endocrine and Diabetes Hospital Qingdao China
6. Department of Chronic Disease, Shibei Centers for Disease Control and Prevention Qingdao China
7. Department of Public HealthUniversity of Helsinki Helsinki Finland