Volume 16, Issue 9, September 2015, Pages 4103-4107
Volume 15, Issue 15, December 2014, Pages 6021-6024
Volume 14, Issue 12, December 2013, Pages 7583-7586
Volume 14, Issue 11, November 2013, Pages 6411-6413
Volume 13, Issue 12, December 2012, Pages 6005-6010
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