RT Journal Article SR Electronic T1 Clustering of extraarticular manifestations in patients with rheumatoid arthritis. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 179 OP 180 VO 35 IS 1 A1 Carl Turesson A1 Robyn L McClelland A1 Teresa Christianson A1 Eric Matteson YR 2008 UL http://www.jrheum.org/content/35/1/179.abstract AB