Other: PEST Screening group

When visiting their dermatologists, all eligible patients with moderate-to-severe plaque psoriasis (PsO) eligible for treatment with biologic Disease-Modifying Antirheumatic Drugs (bDMARDs) will be screened for psoriatic arthritis (PsA) using PEST+pictures+2, a variation of the PEST screening tool.~The PEST+pictures+2 is made up of 3 components:~1. Psoriasis Epidemiology Screening Tool (PEST) consisting of 5 simple questions~2. PEST+2 refers to the PEST modified with two additional questions (Do you have morning stiffness that lasts for more than one (1) hour? Do you wake up at night because of low back or buttock pain?), AND~3. PEST+pictures which provides an opportunity for patients to modify their answers to PEST questions 1, 3, and 5 by presenting them with pictures of swollen joints, fingernail pitting, and swollen fingers and toes.