Volume 16, Issue 6, June 2015, Pages 2151-2159
Volume 15, Issue 16, December 2014, Pages 6679-6683
Volume 15, Issue 5, May 2014, Pages 2205-2210
Volume 14, Issue 11, November 2013, Pages 6687-6692
Volume 12, Issue 4, April 2011, Pages 1049-1054
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