[1] Univ Pittsburgh, Sch Med, Dept Dermatol, Pittsburgh, PA 15213 USA
[2] Univ Pittsburgh, Sch Med, Div Pulm Allergy & Crit Care, Pittsburgh, PA 15213 USA
[3] Univ Pittsburgh, Sch Med, Dept Med, Pittsburgh, PA 15213 USA
[4] Univ Pittsburgh, Sch Med, Dept Pathol, Pittsburgh, PA 15213 USA
[5] Univ Pittsburgh, Inst Canc, Canc Virol Program, Pittsburgh, PA 15213 USA
[6] NCI, Cellular Oncol Lab, NIH, Bethesda, MD 20892 USA