1. Advanced Dermatology, Norwich, Connecticut
2. Department of Dermatology, Brown University, Providence, Rhode Island3Department of Epidemiology, Brown University, Providence, Rhode Island4Center for Dermatoepidemiology, VA Medical Center, Providence, Rhode Island5Department of Dermatology Rhode Island
3. Department of Dermatology, Wake Forest University School of Medicine, Winston-Salem, North Carolina
4. Department of Dermatology, University of Cincinnati Hospital, Cincinnati, Ohio