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Satheshkumar A, Elango KP.Satheshkumar A, et al.Spectrochim Acta A Mol Biomol Spectrosc. 2012 Dec;98:378-83. doi: 10.1016/j.saa.2012.08.056. Epub 2012 Aug 27.Spectrochim Acta A Mol Biomol Spectrosc. 2012.PMID: 22981514