Robbins Matthew S, Evans Randolph W
Montefiore Headache Center, Saul R. Korey Department of Neurology, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
Headache. 2012 Nov-Dec;52(10):1579-89. doi: 10.1111/j.1526-4610.2012.02280.x. Epub 2012 Oct 18.