N. Licking experiences no disclosures related for the manuscript. M. Sowell has obtained payment for serving on a speakers' bureau for Amgen/Novartis Pharmaceuticals; has served as manuscript editor for Headache Observe: All authors, Other than the first/corresponding writer, should total a independent Disputes & Debates Submission Variety and provide through http://ethan406n1sh9.dgbloggers.com/profile