1. From the Departments of Medicine (S.T.C., E.T.R.), Dermatology (S.T.C.), Radiology (A.M.C.), and Pathology (R.K.F.), Massachusetts General Hospital, the Departments of Dermatology (S.T.C.), Medicine (E.T.R.), Radiology (A.M.C.), and Pathology (R.K.F.), Harvard Medical School, and the Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health (E.T.R.) — all in Boston.