1. From the Miami Itch Center, Miller School of Medicine, University of Miami, Miami, Florida, USA.
2. Division of Dermatology, University of Louisville, Louisville, Kentucky, USA.
3. Department of Dermatology, University Hospitals of Cleveland, Cleveland, Ohio, USA.
4. George Washington School of Medicine and Health Sciences, Washington, District of Columbia, USA.
5. Pfizer Pharmaceuticals Ltd., Herzliya Pituah, Israel.
6. Pfizer Inc., New York, New York, USA.
7. Pfizer Brasil Ltda., São Paulo, Brazil.