[1] Shandong Univ, Sch Publ Hlth, Cheeloo Coll Med, Ctr Hlth Management & Policy Res, 44 Wenhuaxi Rd, Jinan 250012, Peoples R China
[2] Shandong Univ, NHC Key Lab Hlth Econ & Policy Res, 44 Wenhuaxi Rd, Jinan 250012, Peoples R China
[3] Peking Univ, Sch Publ Hlth, Dept Global Hlth, 38 Xueyuan Rd, Beijing 100191, Peoples R China