On the etiology of progressive hyperkinetic encephalitis in Bulgaria.
D000293:Adolescent; D000328:Adult; D001769:Blood; D002031:Bulgaria; D002648:Child; D004660:Encephalitis / Q000209:etiology* / Q000276:immunology*; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D009500:Neutralization Tests