Prevalence and clinical features of psoriatic arthritis and joint complaints in 2009 patients with psoriasis: results of a German national survey.
J Eur Acad Dermatol Venereol. 2009 Jun;23(6):683-91. doi: 10.1111/j.1468-3083.2009.03159.x. Epub 2009 Mar 6.
J Eur Acad Dermatol Venereol. 2009.
PMID: 19309433