Psoriasis is common, carries a substantial burden even when not extensive, and is associated with widespread treatment dissatisfaction.
Stern RS, Nijsten T, Feldman SR, Margolis DJ, Rolstad T. Psoriasis is common, carries a substantial burden even when not extensive, and is associated with widespread treatment dissatisfaction. J Investig Dermatol Symp Proc. 2004 Mar; 9(2):136-9.