Vitamin D deficiency increases risk of chronic headache | International News Live Blog

https://internationalnewsliveblog.wordpress.com/2017/01/05/vitamin-d-deficiency-increases-risk-of-chronic-headache/

Vitamin D deficiency may increase the risk of chronic headache, according to a new study. http://internationalnewslive.com/vitamin-d-deficiency-increases-risk-of-chronic-headache/