Volume 16, Issue 6, June 2015, Pages 2569-2574
Volume 15, Issue 17, December 2014, Pages 7291-7296
Volume 15, Issue 8, August 2014, Pages 3767-3772
Volume 14, Issue 8, August 2013, Pages 4675-4678
Volume 13, Issue 10, October 2012, Pages 5291-5298
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