Kasper, P Diversification of HIV-1 strains after infection from a unique source. [electronic resource] - AIDS research and human retroviruses Feb 1993 - 153-7 p. digital Publication Type: Journal Article ISSN: 0889-2229 Standard No.: 10.1089/aid.1993.9.153 doi Subjects--Topical Terms: Amino Acid SequenceBase SequenceBlood Coagulation Factors--adverse effectsDNA, Viral--geneticsDrug ContaminationGenes, envGenetic VariationHIV Infections--complicationsHIV-1--geneticsHemophilia B--complicationsHumansSequence Homology, Amino AcidSequence Homology, Nucleic Acid