RT Journal Article SR Electronic T1 Overlap Between Systemic Lupus Erythematosus and Rheumatoid Arthritis: Is It Real or Just an Illusion? JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 4 OP 6 DO 10.3899/jrheum.081067 VO 36 IS 1 A1 LUIS M. AMEZCUA-GUERRA YR 2009 UL http://www.jrheum.org/content/36/1/4.abstract AB