Clinical Research.
D000818:Animals; D006800:Deltaretrovirus Infections / Q000150:complications* / Q000276:immunology / Q000382:microbiology; D004812:Epidemiologic Methods; D005544:Forecasting; D006801:Humans; D009422:Nervous System Diseases / Q000209:etiology* / Q000276:immunology / Q000382:microbiology; D012106:Research