Spontaneous occurrence of early region 1A reiteration mutants of type 5 adenovirus in persistently infected human T-lymphocytes .
spontaneous occurrence of early region 1a reiteration mutants of type 5 adenovirus in persistently infected human t-lymphocytes .
O O O B-virus I-virus I-virus I-virus I-virus O B-virus I-virus I-virus O B-cell_type I-cell_type I-cell_type I-cell_type O