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Vitamin D role in headache prevention. Abbreviation: Magnesium (Mg), neural growth factor (NGF), nuerotrophin 3 (NT3), glial cell line derived neurotrophic factor (GDNF), neurotrophin 4 (NT4), transforming growth factor beta 1 (TGF1), interleukin-4 (IL-4), tumor necrosis factor-α (TNF α), macrophage colony stimulating factor (M-CSF).
