Progressive Multifocal Leukoencephalopathy: Can We Reduce Risk in Patients Receiving Biological Immunomodulatory Therapies?
Ann Neurol 68:271-274, Tyler,K., 2010
Probably Medication-Overuse Headache: The Effect of a 2-Month Drug-Free Period
Neurol 66:1894-1898, Zeeberg,P.,et al, 2006