stuck song syndrome

A psoriasis TV ad—with its peppy, nonsensical jingle—gave me a full-blown case of Stuck Song Syndrome. Image: Peakpix.com / Creative Commons 0 Three percent of the US population has psoriasis. Specifically, 2.5-2.7% have Plaque Psoriasis, and the other .4-ish percent have Psoriatic Arthritis. All together, that’s a very small percentage of people. So, why do U.S. drug manufacturers