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Woitalla D, Kuhn W, Müller T. MTHFR C677T polymorphism, folic acid and hyperhomocysteinemia in levodopa treated patients with Parkinson's disease. J Neural Transm Suppl. 2004;(68):15–20. doi: 10.1007/978-3-7091-0579-5_2. PMID: 15354385. |