1. From the Department of Dermatology and Center for Chronic Pruritus, University Hospital Münster, Münster (S.S.), the Department of Dermatology and Allergy, Christine Kühne Center for Allergy Research and Education, University Hospital, Bonn (T.B.), and the Department of Dermatology and Allergy, Ludwig Maximilian University of Munich, Munich (A.W.) — all in Germany; the Itch Center, Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Hospital, Miami (G.Y.); the...