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Zamzuri AK, Md Ali MI, Ahmad A, Mohamad R, Mahdi MA.Zamzuri AK, et al. Among authors: mahdi ma.Opt Lett. 2006 Apr 1;31(7):918-20. doi: 10.1364/ol.31.000918.Opt Lett. 2006.PMID: 16599211Free article.