![Health Medicinet](https://s3.amazonaws.com/weyland.altmetric.com/news_sources/logos/000/000/942/normal/image.png?1402915110)
The prevalence of primary headache disorders and their associated factors among nursing staff in North China
Health Medicinet,
The Journal of Headache and Pain 2015, 16:4 doi:10.1186/1129-2377-16-4 Published: 13 January 2015 Article source: http://healthme…