Volume 16, Issue 2, February 2015, Pages 747-751
Volume 15, Issue 14, December 2014, Pages 5681-5684
Volume 14, Issue 12, December 2013, Pages 7057-7063
Volume 14, Issue 11, November 2013, Pages 6899-6903
Volume 14, Issue 4, April 2013, Pages 2317-2323
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