1. Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
2. Department of Otolaryngology–Head & Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
3. Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
4. Skin Care and Laser Physicians of Beverly Hills, Los Angeles, California
5. Department of Dermatology, Yale School of Medicine, Yale University, New Haven, Connecticut
6. Department of Dermatology, Alpert Medical School, Brown University, Providence, Rhode Island
7. SkinCare Physicians, Chestnut Hill, Massachusetts
8. University of Missouri-Kansas City School of Medicine, Kansas City