JAMA Case Quiz - A 57 yoF w/ #RA has a new vesicular rash. 9mos prior ETN change to ADA. Rash (painful, pruritic) started 2 wks ago. Exam: PIP swelling, & ulcerated plaques on neck, chest, & erythroderma on hands, CRP 15.0 mg/L , ESR 111 mm/h. What would you do? order?