Volume 27, Issue 4, January and February 2003, Pages 763-770
Volume 30, Issue 2, January and February 2006, Pages 291-298
Volume 25, Issue 3, January and February 2001, Pages 543-544
Volume 26, Issue 4, January and February 2002, Pages 673-678
Volume 27, Issue 4, January and February 2003, Pages 771-782
Volume 30, Issue 6, January and February 2006, Pages 775-788
Volume 28, Issue 3, January and February 2004, Pages 395-400
Volume 25, Issue 3, January and February 2001, Pages 555-561
Volume 26, Issue 4, January and February 2002, Pages 679-686
Volume 27, Issue 4, January and February 2003, Pages 783-798
Volume 30, Issue 6, January and February 2006, Pages 789-794
Volume 25, Issue 3, January and February 2001, Pages 563-572
Volume 26, Issue 4, January and February 2002, Pages 687-692
Volume 27, Issue 4, January and February 2003, Pages 799-806
Volume 25, Issue 3, January and February 2001, Pages 573-582
Volume 26, Issue 4, January and February 2002, Pages 693-700
Volume 27, Issue 4, January and February 2003, Pages 807-810
Volume 27, Issue 4, January and February 2003, Pages 811-818