The prevalence of headache may be related with the latitude: a possible role of Vitamin D insufficiency?

Demographic Differences and Trends of Vitamin D Insufficiency in the US Population, 1988-2004

(2009) Adit A. Ginde et al.   ARCHIVES OF INTERNAL MEDICINE

The Prevalence of Headache With Emphasis on Tension-Type Headache in Rural Tanzania: A Community-Based Study

(2009) AS Winkler et al.   CEPHALALGIA

Prevalence of Migraine in a Rural Community in South Benin

(2009) D Houinato et al.   CEPHALALGIA

Prevalence of migraine headache in a rural area of northern Tanzania: A community-based door-to-door survey

(2009) AS Winkler et al.   CEPHALALGIA

Chronic Tension-Type Headache With Vitamin D Deficiency: Casual or Causal Association?

(2009) Sanjay Prakash et al.   HEADACHE

Prevalence of migraine and tension-type headache among adults in Jordan

(2009) Karem H. Alzoubi et al.   JOURNAL OF HEADACHE AND PAIN

Primary headache disorders in the Republic of Georgia: Prevalence and risk factors

(2009) Z. Katsarava et al.   NEUROLOGY

Chronic Daily Headache in Brazil: A Nationwide Population-Based Study

(2008) LP Queiroz et al.   CEPHALALGIA

A Nationwide Population-Based Study of Tension-Type Headache in Brazil

(2008) Luiz P. Queiroz et al.   HEADACHE

Seasonal Variation of Migraine in an Arctic Population

(2008) Hallvard Lilleng et al.   HEADACHE

Distribution of vitamin D binding protein expressing neurons in the rat hypothalamus

(2008) Gustav F. Jirikowski et al.   HISTOCHEMISTRY AND CELL BIOLOGY

A cross-sectional population-based survey of migraine and headache in 21,177 Norwegians: the Akershus sleep apnea project

(2008) Michael Bjørn Russell et al.   JOURNAL OF HEADACHE AND PAIN

Vitamin D and chronic pain

(2008) Sebastian Straube et al.   PAIN

Prevalence and Clinical Correlates of Vitamin D Inadequacy among Patients with Chronic Pain

(2008) Michael K. Turner et al.   PAIN MEDICINE