1. Holick MF. Vitamin D deficiency. New England Journal of Medicine. 2007 Jul 19;357(3):266-81. https://www.ncbi.nlm.nih.gov/pubmed/17634462.
2. Prakash S, Shah ND. Chronic Tension‐Type Headache With Vitamin D Deficiency: Casual or Causal Association?. Headache: The Journal of Head and Face Pain. 2009 Sep 1;49(8):1214-22. https://www.ncbi.nlm.nih.gov/pubmed/19619241.
3. Prakash S, Mehta NC, Dabhi AS, Lakhani O, Khilari M, Shah ND. The prevalence of headache may be related with the latitude: a possible role of Vitamin D insufficiency?. The journal of headache and pain. 2010 Aug 1;11(4):301-7. https://www.ncbi.nlm.nih.gov/pubmed/20464624.
4. Whitney EN, Rolfes SR. Understanding nutrition. Cengage Learning; 2018.
5. Holick MF. Vitamin D deficiency. New England Journal of Medicine. 2007 Jul 19;357(3):266-81. https://www.nejm.org/doi/full/10.1056/nejmra070553
6. Straube S, Moore AR, Derry S, McQuay HJ. Vitamin D and chronic pain. Pain. 2009 Jan 1;141(1-2):10-3. https://www.ncbi.nlm.nih.gov/pubmed/19084336.
7. Thys-Jacobs S, inventor; Thys-Jacobs, Susan, assignee. Method for treating symptoms associated with vascular headaches by administering a combination of calcium and vitamin D. United States patent US 5,443,850. 1995 Aug 22.
8. Thys‐Jacobs S. Alleviation of migraines with therapeutic vitamin D and calcium. Headache: The Journal of Head and Face Pain. 1994 Nov;34(10):590-2. https://www.ncbi.nlm.nih.gov/pubmed/7843955
9. Shipton EE, Shipton EA. Vitamin D deficiency and pain: clinical evidence of low levels of vitamin D and supplementation in chronic pain states. Pain and therapy. 2015 Jun 1;4(1):67-87. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4470966/
10. Straube S, Moore AR, Derry S, McQuay HJ. Vitamin D and chronic pain. Pain. 2009 Jan 1;141(1):10-3. https://www.ncbi.nlm.nih.gov/pubmed/19084336
11. Ropper AH. Adams and Victor's principles of neurology. New York: McGraw-Hill Medical Pub. Division; 2005 Apr 19.
12. Prakash S, Rathore C, Makwana P, Dave A, Joshi H, Parekh H. Vitamin D Deficiency in Patients With Chronic Tension‐Type Headache: A Case‐Control Study. Headache: The Journal of Head and Face Pain. 2017 Jul 1;57(7):1096-108. https://www.ncbi.nlm.nih.gov/pubmed/28470754.
13. Prakash S, Kumar M, Belani P, Susvirkar A, Ahuja S. Interrelationships between chronic tension-type headache, musculoskeletal pain, and vitamin D deficiency: Is osteomalacia responsible for both headache and musculoskeletal pain?. Annals of Indian Academy of Neurology. 2013 Oct;16(4):650. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3841620/
14. Kjærgaard M, Eggen AE, Mathiesen EB, Jorde R. Association between headache and serum 25‐Hydroxyvitamin D; the tromsø study: tromsø 6. Headache: The Journal of Head and Face Pain. 2012 Nov;52(10):1499-505. https://www.ncbi.nlm.nih.gov/pubmed/22973803
15. Eyles DW, Smith S, Kinobe R, Hewison M, McGrath JJ. Distribution of the vitamin D receptor and 1α-hydroxylase in human brain. Journal of chemical neuroanatomy. 2005 Jan 1;29(1):21-30. https://www.ncbi.nlm.nih.gov/pubmed/15589699.