1994c-178 abstracts acquiredimmunodeficiencysyndrome africa aids(disease) burkittlymphoma cancer congresses etiology hepatitisbvirus herpesviridaeinfections herpesvirusdiseases hiv hiv(viruses) hivinfections kaposi'ssarcoma leukemia liverneoplasms medicaloncology nasopharyngealneoplasms neoplasms oncogenicviruses pathogenicity penileneoplasms sarcoma statistics unitedstates uterinecervicalneoplasms viralcarcinogenesis zwd308a28891993