“…Recently there have been several reports that vitamin D plays a role in the pathogenesis of many diseases. Insufficient vitamin D levels were detected in many chronic illnesses, including coronary artery disease, 2 diabetes mellitus, 3 systemic lupus erythematosus, rheumatoid arthritis, multiple sclerosis, psoriasis, malignancy, autoimmune, infectious diseases, and Behcet's disease. 4 Furthermore, smoking, alcohol intake were related the low vitamin D levels.…”