Volume 16, Issue 5, May 2015, Pages 1821-1825
Volume 14, Issue 4, April 2013, Pages 2349-2354
Volume 14, Issue 1, January 2013, Pages 341-346
Volume 13, Issue 12, December 2012, Pages 6343-6348
Volume 12, Issue 11, November 2011, Pages 3091-3095
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