title: Letter: Pterin administration as a therapy for P.K.U. due to dihydropteridine-reductase deficiency?
mesh_terms: D006801:Humans; D007223:Infant; D009247:NADH, NADPH Oxidoreductases / Q000172:deficiency*; D010661:Phenylketonurias / Q000188:drug therapy* / Q000209:etiology; D011622:Pterins / Q000008:administration & dosage* / Q000627:therapeutic use
chemical_list: D011622:Pterins; D009247:NADH, NADPH Oxidoreductases