1 Department of Dermatology (Center for Dermatology Research), Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157-1071, U.S.A.
2 Department of Pathology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157-1071, U.S.A.
3 Department of Social Sciences & Health Policy, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157-1071, U.S.A.