Characteristics of Rheumatoid Arthritis with Lung Cancer:a Clinical Analysis of Nine Cases 
ZHANG Guohua,WANG Yuhua,ZHANG Lingling,GAO Lan,LUO Junli,ZHAO Miansong
Chinese General Practice . 2019, (27): 3383 -3386 .  DOI: 10.12114/j.issn.1007-9572.2019.00.055