Volume 15, Issue 22, December 2014, Pages 9627-9630
Volume 14, Issue 12, December 2013, Pages 7701-7706
Volume 14, Issue 1, January 2013, Pages 469-473
Volume 13, Issue 8, August 2012, Pages 4187-4190
Volume 11, Issue 6, June 2010, Pages 1523-1527
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