Low serum 25-hydroxyvitamin D is associated with higher risk of frequent headache in middle-aged and older men
Crossref DOI link:
Update policy: https://doi.org/10.1007/SPRINGER_CROSSMARK_POLICY
Virtanen, Jyrki K.
Text and Data Mining valid from 2017-01-03
18 October 2016
25 November 2016
3 January 2017
The authors declare no competing financial interests.