[1] Shandong Univ, Key Lab Hlth Econ & Policy Res, Ctr Hlth Management & Policy, Sch Hlth Care Management,Minist Hlth, Jinan 250012, Shandong, Peoples R China
[2] Shandong Univ, Sch Publ Hlth, Dept Epidemiol & Hlth Stat, Jinan 250012, Shandong, Peoples R China
[3] Jinan Ctr Dis Control & Prevent, Jinan 250021, Shandong, Peoples R China
[4] Yanggu Cty Ctr Dis Control & Prevent, Liaocheng City 252300, Shandong, Peoples R China
[5] Karolinska Inst, Dept Publ Hlth Sci, Global Hlth Hlth Syst & Policy Improving Use Med, S-17171 Stockholm, Sweden