Neurology | May 14, 2012 | Volume: 58 | Issue: 12 | Pages: 1739-1744
Neurology | May 13, 2012 | Volume: 56 | Issue: 11 | Pages: 1514-1522
Multiple Sclerosis Journal | April 28, 2010 | Volume: 16 | Issue: 6 | Pages: 756-759
Cephalalgia | March 11, 2003 | Volume: 20 | Issue: 2 | Pages: 127-129