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.
Rubio-Beltrán E, Labastida-Ramírez A, Haanes KA, van den Bogaerdt A, Bogers AJ, Dirven C, Danser AJ, Xu C, Snellman J, MaassenVanDenBrink A.Rubio-Beltrán E, et al. Among authors: snellman j.Cephalalgia. 2019 Dec;39(14):1735-1744. doi: 10.1177/0333102419863027. Epub 2019 Jul 8.Cephalalgia. 2019.PMID: 31284729