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In the above titled paper (ibid., vol.48, no. 2, pp. 169-174, Feb. 2012), the affiliation of Yun-Yan Zhang should have read as follows. Y.Y. Zhang is with the Institute of Optoelectronic Materials and Technology, South China Normal University, Guangzhou 510631, China (e-mail: firstname.lastname@example.org).
Date of Publication: Sept. 2012