An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Viana M, Tronvik EA, Do TP, Zecca C, Hougaard A.Viana M, et al. Among authors: hougaard a.J Headache Pain. 2019 May 30;20(1):64. doi: 10.1186/s10194-019-1008-x.J Headache Pain. 2019.PMID: 31146673Free PMC article.
Hougaard A, Amin FM, Hauge AW, Ashina M, Olesen J.Hougaard A, et al.Neurology. 2013 Jan 29;80(5):428-31. doi: 10.1212/WNL.0b013e31827f0f10. Epub 2013 Jan 23.Neurology. 2013.PMID: 23345632
Amin FM, Lundholm E, Hougaard A, Arngrim N, Wiinberg L, de Koning PJ, Larsson HB, Ashina M.Amin FM, et al. Among authors: hougaard a.J Headache Pain. 2014 May 7;15(1):25. doi: 10.1186/1129-2377-15-25.J Headache Pain. 2014.PMID: 24886137Free PMC article.