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Strisciuglio, P., Concolino, D., Moricca, M.T. et al. Normal serum levels of vitamin B12 and folic acid in children with phenylketonuria. Eur J Pediatr 154, 866 (1995). https://doi.org/10.1007/BF01959802
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DOI: https://doi.org/10.1007/BF01959802