Self-Sustained Sequence ReplicationSensitivity and SpecificityRNA, ViralReagent Kits, DiagnosticCytomegalovirusMolecular ProbesViremiaCytomegalovirus InfectionsRNA, BacterialRNA, Ribosomal, 18SDNA ProbesGanciclovirAspergillosisGene AmplificationRNA, Ribosomal, 16SEvaluation Studies as TopicReverse Transcriptase Polymerase Chain ReactionReproducibility of ResultsPolymerase Chain ReactionViral Matrix ProteinsRNA, MessengerViral LoadDNA PrimersAntigens, ViralHIV-1Base SequenceViral Proteins