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Fig 4. MR spectroscopy of age-matched controls. There is no evidence for citrate in spectra of age-matched control subjects as illustrated in a representative PRESS (TE, 35 ms) spectrum of occipital gray matter (A). Spectra from model solutions of citrate and NAA are shown for comparison (B). Note that the NAA peak at approximately 2.7 ppm does not co-resonate with citrate.
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