preferred_name: GTP cyclohydrolase I deficiency
preferred_name_lc: gtp cyclohydrolase i deficiency
label: HYPERPHENYLALANINEMIA, TETRAHYDROBIOPTERIN-DEFICIENT, DUE TO GTP CYCLOHYDROLASE I DEFICIENCY
label_lc: hyperphenylalaninemia, tetrahydrobiopterin-deficient, due to gtp cyclohydrolase i deficiency