Cytomegalovirus antigenemia as a predictor of cmv disease after bone marrow transplantation - Machado, C M; Vilas Boas, L S; Do Canto, C L; Ostronoff, M; Dulley, Frederico Luiz; Pannuti, Cláudio Sérgio (International Symposium on Infectious in the Immunocompromised Host, 1994)