Cognition of Hierarchical Medical System among Residents and Its Influencing Factors in Henan Province 
CHEN Zhengxu,MENG Lingchao,YUAN Liufei,CHANG Zhu,ZHANG Wang,LIANG Shimin,TIAN Yuhui
Chinese General Practice . 2020, (7): 799 -802 .  DOI: 10.12114/j.issn.1007-9572.2019.00.620