6Miriam RC, Domenic JR, Daniel OC, et al. Baseline relationships be- tween psoriasis and psoriatic arthritis[J]. Rheumatol, 1999,26(8 ) : 1752-1756.
7MeHugh NJ, Balaehvishnan C, Jones SM. Progression of peripheral join! disease in psoriatic arthritis: a 5- yr prospective study [J]. Rheumatology ( Oxford ), 2003,42 ( 6 ) : 778 -783.
8John B, Dafna G. Diagnosis and management of psoriatic arthritis [ J ]. Drugs, 2002,62 ( 17 ) : 2447-2457.
9Dafna DG, Vrenon TF. Progression in psoriatic arthritis:role of time varying clinical indicatiors[J]. Rheumatol, 1999,26( 11):2409-2413.
10Schellekens GA, Visser H, de Jong BA, et a l. The diagnostfi prop- erties of rheumatoid arthritis antibodies recognizing a cyclic citrul- linated peptide [J]. Arthritis Rheum, 2000,43 ( 1 ) : 155-163.
2Helliwell P, Marchesoni A, Peters M, et al. A re-evaluation of the osteoarticular manifestations of psoriasis[J]. Br J Rheumatol, 1991, 30(5): 339-345.
3McGonagle D, Conaghan PG, Emery P. Psoriatic arthritis: a unified concept twenty years on[J]. Arthritis Rheum, 1999, 42(6): 1080-1086.
4Gladman DD, Shuckett R, Russell ML, et al. Psoriatic arthritis (PSA)--an analysis of 220 patients[J]. Q J Med, 1987, 62(238): 127-141.
5Veale D, Rogers S, Fitzgerald O. Classification of clinical subsets in psoriatic arthritis[J]. Br J Rheumatol, 1994, 33(2): 133- 138.
6Marsal S, Armadans-Gil L, Martinez M, et al. Clinical, radiographic and HLA associations as markers for different patterns of psoriatic arthritis[J]. Rheumatology (Oxford), 1999, 38(4): 332-337.
7Gelfand JM, Gladman DD, Mease PJ, et al. Epidemiology of psori- atic arthritis in the population of the United States. J Am Acad Der- matol 2005; 53 (4) : 573.
