Ultraviolet B light inactivates bone marrow T lymphocytes but spares hematopoietic precursor cells.
Deeg HJ, Bazar L, Sigaroudinia M, Cottler-Fox M. Ultraviolet B light inactivates bone marrow T lymphocytes but spares hematopoietic precursor cells. Blood. 1989 Feb; 73(2):369-71.