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Heales, S.J.R., Canevari, L., Brand, M.P. et al. Cerebrospinal fluid nitrite plus nitrate correlates with tetrahydrobiopterin concentration. J Inherit Metab Dis 22, 221–223 (1999). https://doi.org/10.1023/A:1005540828706
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DOI: https://doi.org/10.1023/A:1005540828706