Lipton RB, Stewart WF, Cady R, Hall C, O'Quinn S, Kuhn T, Gutterman D. 2000 Wolfe Award. Sumatriptan for the range of headaches in migraine sufferers: results of the Spectrum Study. Headache. 2000 Nov;40(10):783–91. doi: 10.1046/j.1526-4610.2000.00143.x. PMID: 11135021.