1. From the Department of Anesthesiology, Perioperative and Pain Medicine (I.C., L.H., M.J.B., J.M.H.), Stanford Headache Clinic (I.C.), Department of Neurology (N.Z., M.J.B., A.P., L.M., O.O., C.B.), Departments of Neurology and Neurosciences and (by courtesy) Anesthesia (R.P.C.), and Department of Radiology (B.L., S.H.), Stanford University, Palo Alto, CA; Headache Neurology (N.H.), Metrodora Institute, West Valley City, UT; Department of Biomedical Informatics (S.B.), Emory University, Atlanta, GA;...