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CSF-methionine is elevated in psychotic patients.
Regland B, Abrahamsson L, Blennow K, Grenfeldt B, Gottfries CG. Regland B, et al. Among authors: abrahamsson l. J Neural Transm (Vienna). 2004 May;111(5):631-40. doi: 10.1007/s00702-004-0128-9. Epub 2004 Mar 19. J Neural Transm (Vienna). 2004. PMID: 15088156
Vitamin B12 in CSF: reduced CSF/serum B12 ratio in demented men.
Regland B, Abrahamsson L, Blennow K, Gottfries CG, Wallin A. Regland B, et al. Among authors: abrahamsson l. Acta Neurol Scand. 1992 Apr;85(4):276-81. doi: 10.1111/j.1600-0404.1992.tb04044.x. Acta Neurol Scand. 1992. PMID: 1585799
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