Characteristics Analysis of Subclinical Synovitis Measured with Ultrasound in Rheumatoid Arthritis 
CHEN Guangyao,HU Qi,XU Yuan,MA Xiao,LUO Jing,TAO Qingwen
Chinese General Practice . 2019, (6): 735 -738 .  DOI: 10.12114/j.issn.1007-9572.2018.00.369