Volume 13, Issue 5, May 2012, Pages 1851-1856
Volume 12, Issue 10, October 2011, Pages 2509-2512
Volume 11, Issue 2, February 2010, Pages 335-338
Volume 10, Issue 3, March 2009, Pages 457-462
Volume 6, Issue 4, April 2005, Pages 449-454
Volume 6, Issue 1, January 2005, Pages 72-76
Volume 5, Issue 3, March 2004, Pages 301-302
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