[1] Univ Alabama Birmingham, Birmingham, AL USA
[2] Univ Hosp Munster, Dept Dermatol, Munster, Germany
[3] Univ Hosp Munster, Interdisciplinary Competence Ctr Chron Pruritus K, Munster, Germany
[4] Prob Med Res, Columbus, OH USA
[5] Hosp Gen Univ Alicante, Dermatol Dept, Alicante, Spain
[6] Univ British Columbia, Dept Dermatol & Skin Sci, Vancouver, BC, Canada
[7] Vancouver Coastal Hlth, Vancouver, BC, Canada
[8] BC Childrens Hosp Res Inst, Vancouver, BC, Canada
[9] Univ Ziekenhuis Brussel, Dept Dermatol, Brussels, Belgium
[10] Vrije Univ Brussel, Brussels, Belgium
[11] LEO Pharma AS, Ballerup, Denmark
[12] George Washington Univ, Sch Med & Hlth Sci, Depat Dermatol, Washington, DC 20052 USA