Neurology | February 16, 2009 | Volume: 72 | Issue: 7 | Pages: 671-673
Neurology | August 27, 2007 | Volume: 69 | Issue: 9 | Pages: 925-926
Cephalalgia | June 20, 2007 | Volume: 27 | Issue: 7 | Pages: 840-842
10.1111/j.1468-2982.2007.01311.x | PMID 17598765
Neurology | December 13, 2006 | Volume: 67 | Issue: 11 | Pages: 1984-1989
Neurology | July 12, 2006 | Volume: 65 | Issue: 3 | Pages: 486-488
Neurology | July 12, 2006 | Volume: 64 | Issue: 12 | Pages: 2033-2039
Neurology | April 24, 2006 | Volume: 66 | Issue: 8 | Pages: 1144-1152
Cephalalgia | March 19, 2004 | Volume: 24 | Issue: 4 | Pages: 305-308
10.1111/j.1468-2982.2004.00666.x | PMID 15030541