RT Journal Article SR Electronic T1 Beyond Early Diagnosis: Occult Psoriatic Arthritis JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1556 OP 1558 DO 10.3899/jrheum.091026 VO 37 IS 8 A1 CARLO PALAZZI A1 ENNIO LUBRANO A1 SALVATORE D’ANGELO A1 IGNAZIO OLIVIERI YR 2010 UL http://www.jrheum.org/content/37/8/1556.abstract AB