[1] Augusta Univ, Med Ctr, Dept Internal Med, Augusta, GA 30912 USA
[2] Wake Forest Sch Med, Dept Dermatol, Ctr Dermatol Res, Winston Salem, NC USA
[3] Wake Forest Sch Med, Dept Pathol, Winston Salem, NC USA
[4] Wake Forest Sch Med, Dept Publ Hlth Sci, Winston Salem, NC USA