TY - JOUR A1 - Ma, S. A1 - Zhou, X.D. A1 - Jiang, M.M. A1 - Li, Q. A1 - Gao, C. A1 - Cao, W. A1 - Li, L. T1 - Comparison of access to health services among urban-to-urban and rural-to-urban older migrants, and urban and rural older permanent residents in Zhejiang Province, China: A cross-sectional survey Y1 - 2018 DO - 10.1186/s12877-018-0866-4 VL - 18 IS - 1 ER -