1. Center for Dermatology Research, Department of Dermatology, Wake Forest School of Medicine, 1 Medical Center Boulevard, Winston-Salem, NC 27157-1071, USA
2. Center for Dermatology Research, Department of Dermatology, Wake Forest School of Medicine, Winston-Salem, NC, USA
3. Department of Pathology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
4. Department of Social Sciences & Health Policy, Wake Forest School of Medicine, Winston-Salem, NC, USA
5. Department of Dermatology, University of Southern Denmark, Odense, Denmark