Volume 12, Issue 1, January 2011, Pages 247-252
Volume 11, Issue 5, May 2010, Pages 1257-1262
Volume 11, Issue 2, February 2010, Pages 343-347
Volume 10, Issue 3, March 2009, Pages 471-478
Volume 10, Issue 2, February 2009, Pages 279-286
Volume 10, Issue 2, February 2009, Pages 287-294
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