1Ibrahim G, Waxman R, Helliwell PS. The prevalence of psoriatic arthritis in people with psoriasis[J]. Arthritis Rheum, 2009, 61 (10) : 1373-1378.
2Slobodin G, Rimar D, Boulman N, et al. Entheseal involvement in systemic disorders[J]. Clin Rheumatol, 2015, 34(12): 2001- 2010.
3Gisondi P, Tinazzi I, E1-Dalati G, et al. Lower limb enthe- sopathy in patients with psoriasis without clinical signs of arthropathy: a hospital-based case-control study[J]. Ann Rheum Dis, 2008, 67( 1 ) : 26-30.
4Gutierrez M, Filippucci E, De Angelis R, et al. Subclinical entheseal involvement in patients with psoriasis: an ultrasound study [J]. Semin Arthritis Rheum, 2011, 40 (5) : 407-412.
5Bandinelli F, Prignano F, Bonciani D, et al. Ultrasound detects occult entheseal involvement in early psoriatic arthritis inde- pendently of clinical features and psoriasis severity[J]. Clin Exp Rheumatol, 2013, 31(2): 219-224.
6Chauvin NA, Ho-Fung V, Jaramillo D, et al. Ultrasound of the joints and entheses in healthy children[J]. Pediatr Radiol, 2015, 45(9): 1344-1354.
7Taylor W, Gladman D, Helliwell P, et al. Classification criteria for psoriatic arthritis: development of new criteria from a large international study [J]. Arthritis Rheum, 2006, 54 (8): 2665- 2673.
8Balint PV, Kane D, Wilson H, et al. Uhrasonography of en- theseal insertions in the lower limb in spondyloarthropathy [J]. Ann Rheum Dis, 2002, 61 (10): 905-910.
9Zhou B, Zhu J. Paying attention to enthesitis in early untreated arthritis: MRI for the evaluation of enthesitis [J]. Ann Rheum Dis, 2014, 73(10): e60-e60.
10Tillett W, Eder L, Goel N, et al. Enhanced patient involve- ment and the need to revise the core set-report from the pso- riatic arthritis working group at OMERACT 2014[J]. J Rheumatol 2015, 42( 11 ) : 2198-2203.