Investigation and thinking on the development of primary medical situations in Yantai
Bao Xinyong, Jin Ling, Wang Shengping, Yu Ziwei, Lu Ning, Jiang Xiaoming, Li Guoliang, Chen Zhenduo
journal1 . 2020, (6): 481 -483 .  DOI: 10.3969/j.issn.1006-5253.2020.06.001