Volume 15, Issue 7, July 2014, Pages 3035-3039
Volume 10, Issue 6, June 2009, Pages 981-986
Volume 10, Issue 2, February 2009, Pages 251-257
Volume 9, Issue 4, April 2008, Pages 543-548
Volume 8, Supplement, December 2007, Pages 35-80
Volume 2, Issue 3, March 2001, Pages 215-224
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