Volume 16, Issue 6, June 2015, Pages 2489-2493
Volume 13, Issue 6, June 2012, Pages 2629-2633
Volume 12, Issue 10, October 2011, Pages 2741-2745
Volume 7, Issue 3, March 2006, Pages 485-488
Volume 6, Issue 4, April 2005, Pages 501-504
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