Spine
-
A prospective comparison. ⋯ 2.
-
Multicenter Study
Predictive Risk Factors of Cervical Spine Instabilities in Rheumatoid Arthritis: A Prospective Multicenter over 10-Year Cohort Study.
A prospective multicenter cohort study for more than 10 years of outpatients with rheumatoid arthritis (RA). ⋯ 3.
-
Retrospective analysis of national insurance billing database. ⋯ 3.
-
A retrospective study of prospectively collected data. ⋯ 3.