13C-phenylalanine breath test and serum biopterin in schizophrenia, bipolar disorder and major depressive disorder
Keywords: اسکیزوفرنی ناخوشایند; 13C-phenylalanine breath test; Stable isotope; Phenylalanine hydroxylase; Dopamine; Tetrahydrobiopterin (BH4); Late-onset schizophrenia;