Volume 16, Issue 18, December 2015, Pages 8335-8338
Volume 15, Issue 24, December 2014, Pages 10739-10743
Volume 13, Issue 10, October 2012, Pages 4989-4992
Volume 11, Issue 3, March 2010, Pages 809-814
Volume 10, Issue 6, June 2009, Pages 1121-1126
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