Blood Specimen CollectionSpecimen HandlingUrine Specimen CollectionLaboratories, HospitalSensitivity and SpecificityClinical Laboratory TechniquesUrinePolymerase Chain ReactionBacteriological TechniquesReagent Kits, DiagnosticQuality ControlTime FactorsChlamydia InfectionsDisease OutbreaksReproducibility of ResultsBloodPaperUnited StatesPhlebotomyPollen TubeNeural Tube DefectsEvaluation Studies as TopicBlood PreservationNeural TubeHIV SeroprevalenceFallopian TubesInfant, NewbornForensic MedicineVirologyEhrlichiaPlasmaEustachian TubeDNA, BacterialCytomegalovirusGas Chromatography-Mass SpectrometrySubstance Abuse DetectionMicrobiological TechniquesAIDS SerodiagnosisChest TubesCytomegalovirus InfectionsBacteremiaNeonatal ScreeningData CollectionCentrifugationFiltrationEhrlichiosisNeoplastic Cells, CirculatingFalse Positive ReactionsProspective StudiesMolecular Sequence DataDNA, ViralPregnancyGenotypeBlood Chemical AnalysisFetal BloodCase-Control StudiesVirus CultivationCulture MediaSeroepidemiologic StudiesSequence Analysis, DNABase SequenceDNA, ProtozoanDNA PrimersHIV InfectionsAutopsyImmunoenzyme TechniquesEnzyme-Linked Immunosorbent Assay