1. Department of Internal Medicine, Scripps Clinic/Scripps Green Hospital, 10666 N. Torrey Pines Road, La Jolla, CA 92037, USA
2. Department of Dermatology, Howard University, 2041 Georgia Avenue NW, Suite 2107, Washington, DC 20060, USA
3. Division of Dermatology, Atlanta VAMC, 1670 Clairmont Road, Decatur, GA 30033, USA
4. Department of Dermatology, Emory University, 1525 Clifton Road NE, 3rd Floor, Atlanta, GA 30322, USA