RT Journal Article SR Electronic T1 Practice variation in the treatment of rheumatoid arthritis among German rheumatologists. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 2201 OP 2208 VO 28 IS 10 A1 Zink, A A1 Listing, J A1 Ziemer, S A1 Zeidler, H A1 German Collaborative Arthritis Centres YR 2001 UL http://www.jrheum.org/content/28/10/2201.abstract AB