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.
Spierings EL, McAllister PJ, Bilchik TR.Spierings EL, et al.Cranio. 2015 Apr;33(2):115-21. doi: 10.1179/0886963414Z.00000000084. Epub 2014 Oct 16.Cranio. 2015.PMID: 25323219Clinical Trial.
Spierings EL, Sorbi M, Maassen GH, Honkoop PC.Spierings EL, et al.Headache. 1997 Apr;37(4):217-20. doi: 10.1046/j.1526-4610.1997.3704217.x.Headache. 1997.PMID: 9150616
Spierings EL, Ranke AH, Schroevers M, Honkoop PC.Spierings EL, et al.Headache. 2000 Apr;40(4):306-10. doi: 10.1046/j.1526-4610.2000.00045.x.Headache. 2000.PMID: 10759935
Spierings EL, Ranke AH, Honkoop PC.Spierings EL, et al.Headache. 2001 Jun;41(6):554-8. doi: 10.1046/j.1526-4610.2001.041006554.x.Headache. 2001.PMID: 11437890
Messinger HB, Spierings EL, Vincent AJ.Messinger HB, et al. Among authors: spierings el.Cephalalgia. 1991 Nov;11(5):233-7. doi: 10.1046/j.1468-2982.1991.1105233.x.Cephalalgia. 1991.PMID: 1773438