Volume 15, Issue 21, December 2014, Pages 9153-9157
Volume 15, Issue 23, December 2014, Pages 10397-10400
Volume 15, Issue 23, December 2014, Pages 10495-10500
Volume 14, Issue 4, April 2013, Pages 2325-2331
Volume 13, Issue 8, August 2012, Pages 3803-3807
Volume 13, Issue 7, July 2012, Pages 3073-3076
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