Ständer, S.; Luger, T.; Cappelleri, J. C.; Bushmakin, A. G.; Mamolo, C.; Zielinski, M. A.; Tallman, A. M.; Yosipovitch, G. Validation of the Itch Severity Item As a Measurement Tool for Pruritus in Patients With Psoriasis: Results from a Phase 3 Tofacitinib Program. Acta Derm Venereol 2017, 98, 340-345.