Volume 13, Issue 8, August 2012, Pages 3687-3693
Volume 13, Issue 5, May 2012, Pages 1803-1808
Volume 13, Issue 5, May 2012, Pages 2249-2252
Volume 12, Issue 9, September 2011, Pages 2279-2284
Volume 8, Issue 3, March 2007, Pages 438-444
Volume 3, Issue 4, April 2002, Pages 353-359