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Farouk M, Elaziz OA, Tawakkol SM, Hemdan A, Shehata MA.Farouk M, et al. Among authors: tawakkol sm.Spectrochim Acta A Mol Biomol Spectrosc. 2014 Apr 5;123:473-81. doi: 10.1016/j.saa.2013.12.094. Epub 2014 Jan 3.Spectrochim Acta A Mol Biomol Spectrosc. 2014.PMID: 24424258