R. Zachariae, C. C. Zachariae, U. Lei, and A. F. Pedersen, “Affective and Sensory Dimensions of Pruritus Severity: Associations with Psychological Symptoms and Quality of Life in Psoriasis Patients”, Acta Derm Venereol, vol. 88, no. 2, pp. 121–127, Jan. 2008.