Gelfand Amy A, Qubty William, Goadsby Peter J
Pediatric Headache Center, University of California, San Francisco.
National Institute for Health Research-Wellcome Trust King's Clinical Research Facility, King's College London, England.
JAMA Neurol. 2017 Aug 1;74(8):893-894. doi: 10.1001/jamaneurol.2017.1011.