Current situation and prospects of Yantai's construction of health service system for the elderly
Bai Tonglin, Yu Zhongli, Meng Xianfeng, Li Shanshan, Han Jianxin.
journal1 . 2020, (5): 389 -393 .  DOI: 10.3969/j.issn.1006-5253.2020.05.002