RT Journal Article SR Electronic T1 Dr. Perl replies JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1217 OP 1217 DO 10.3899/jrheum.100908 VO 38 IS 6 A1 ANDRAS PERL YR 2011 UL http://www.jrheum.org/content/38/6/1217.abstract AB