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Whitehead RA. Puil E. Ries CR. Schwarz SK. Wall RA. Cooke JE. Putrenko I. Sallam NA. Macleod BA. (Jun 28, 2012). “GABA(B) receptor-mediated selective peripheral analgesia by the non-proteinogenic amino acid, isovaline.”. Neuroscience213: 154-60. doi:10.1016/j.neuroscience.2012.04.026. PMID22525135.