 11. Subjects who have been treated with systemic or photo antipsoriatic therapiesdrugs within 4 weeks prior to study entry including methotrexate, cyclosporine, acitretin and other oral retinoids, broadband or narrowband UVB, PUVA, home or professional tanning lights or other nonprescription UV light sources, photodynamic therapy PDT, lasers, mycophenalate mofetil MMF, thioguanine, hydroxyurea, sirolimus, azathioprine, 6-mercaptopurine 6-MP, or etanercept. 