Community-based Prevalence of the Coexistence of Multiple Chronic Diseases among Young and Middle-aged People in Shanghai 
ZHANG Yajun,LIU Hua,WANG Zhaoxin,SHI Jianwei
Chinese General Practice . 2021, (16): 2034 -2038 .  DOI: 10.12114/j.issn.1007-9572.2021.00.046