1. AB0267 No Remarkable Differences on Sonograms of Wrist, Metacarpophalangeal and Proximal Interphalangeal Joints between Rheumatoid Factor Negative Rheumatoid Arthritis and Rheumatoid Factor Positive Rheumatoid Arthritis Patients. (15th July 2016) Authors: Lin, D.F.; Hu, Z.Y.; Guo, X.H.; Cao, J.Y.; Pan, Y.F. Journal: Annals of the rheumatic diseases Issue: Volume 75(2016)Supplement 2 Page Start: 991 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗