title: Vitamin B12, cognitive impairment, survival and HHV-6A.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000097:blood* / Q000150:complications / Q000821:virology; D003072:Cognition Disorders / Q000097:blood* / Q000150:complications; D015673:Fatigue Syndrome, Chronic / Q000097:blood* / Q000150:complications / Q000821:virology; D015654:Herpesvirus 6, Human / Q000302:isolation & purification*; D006801:Humans; D007437:Intrinsic Factor / Q000378:metabolism; D014805:Vitamin B 12 / Q000378:metabolism*; D014806:Vitamin B 12 Deficiency / Q000150:complications
chemical_list: D007437:Intrinsic Factor; D014805:Vitamin B 12