Affiliation: | 1. Department of Dermatology, University of Pennsylvania, Philadelphia, PA, USA;2. Medstar Georgetown University Hospital, Washington, DC, USA;3. Princess Marina Hospital, Gaborone, Botswana;4. Princess Marina Hospital, Gaborone, Botswana Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA Botswana-University of Pennsylvania Partnership, Gaborone, Botswana;5. Department of Dermatology, University of Pennsylvania, Philadelphia, PA, USA Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA |