8US.Department of Health,Education and Welfare,Public Health Service.Classification of Etiologic Agents on the Basis of Hazard.4th Edition.CDC/NIH.1974.
9Schuval S,Lindsey JC,Stapleton JT,et al.GB virus C infection in children with perinatal human immunodeficiency virus infection.Pediatr Infect Dis J,2005,24:417.
