Tetrahydrobiopterin treatment reduces brain L-Phe but only partially improves serotonin in hyperphenylalaninemic ENU1/2 mice. - Scherer T; Allegri G; Sarkissian CN; Ying M; Grisch-Chan HM; Rassi A; Winn SR; Harding CO; Martinez A; Thöny B (Journal of inherited metabolic disease, 2018)