This article has been retracted: please see Elsevier's Article Correction, Retraction, and Removal Policy (https://www.elsevier.com/locate/withdrawalpolicy).

This article has been retracted at the request of the Editors.

An institutional investigation found falsified data in Figures 2, 3, and 4. Images in these figures include reused panels that create false representations. The Editors concur with these findings.

Jung-hsin Hsu, Joseph Gera, and Brian Van Ness approve the retraction. No response was received from Liping Hu, Yijiang Shi, or Alan Lichtenstein.

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2003
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