Herpesvirus 4, HumanEpstein-Barr Virus InfectionsEpstein-Barr Virus Nuclear AntigensNasopharyngeal NeoplasmsViral Matrix ProteinsInfectious MononucleosisBurkitt LymphomaHerpesviridae InfectionsHodgkin DiseaseB-LymphocytesCell Line, TransformedDNA, ViralAntigens, ViralAntibodies, ViralPolymerase Chain ReactionCell LineBase SequenceMolecular Sequence Data