title: Tetrahydrobiopterin metabolism in senile dementia of Alzheimer type.
mesh_terms: D000368:Aged; D000544:Alzheimer Disease / Q000134:cerebrospinal fluid*; D001708:Biopterins / Q000031:analogs & derivatives / Q000134:cerebrospinal fluid*; D002851:Chromatography, High Pressure Liquid; D003704:Dementia / Q000134:cerebrospinal fluid*; D006801:Humans; D008875:Middle Aged; D011621:Pteridines / Q000134:cerebrospinal fluid*
chemical_list: D011621:Pteridines; D001708:Biopterins; C003402:sapropterin