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References

1. ↵
   Bianchi MC, Tosetti M, Battini R, et al. Treatment monitoring of brain creatine deficiency syndromes: a 1H and ³¹P-MR spectroscopy study. AJNR Am J Neuroradiol 2007;28:548–54

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2. ↵
   Renema WK, Schmidt A, van Asten JJ, et al. MR spectroscopy of muscle and brain in guanidinoacetate methyltransferase (GAMT)-deficient mice: validation of an animal model to study creatine deficiency. Magn Reson Med 2003;50:936–43

   CrossRefPubMedWeb of Science
3. ↵
   Schmidt A, Marescau B, Boehm EA, et al. Severely altered guanidino compound levels, disturbed body weight homeostasis and impaired fertility in a mouse model of guanidinoacetate N-methyltransferase (GAMT) deficiency. Hum Mol Genet 2004;13:905–21

   Abstract/FREE Full Text
4. ↵
   Schulze A, Bachert P, Schlemmer H, et al. Lack of creatine in muscle and brain in an adult with GAMT deficiency. Ann Neurol 2003;53:248–51

   CrossRefPubMedWeb of Science