Improving the Role of General Practitioners in the Early Diagnosis and Management of Chronic Diseases: a Case Analysis of Chronic Obstructive Pulmonary Disease 
LI Fan,SHENG Chunfeng,WANG Huanying
Chinese General Practice . 2021, (9): 1044 -1050 .  DOI: 10.12114/j.issn.1007-9572.2020.00.607