EPO and vitamin D deficiency: Other conditions, including osteoporosis, RA, Sjögren’s syndrome, sarcoidosis, hypocalcemia, hypoparathyroidism, osteomalacia, vitamin D deficiency, renal dialysis, anemia, Paget’s disease of bone, erythropoietin therapy, cyclophosphamide therapy, alcohol consumption, and obesity, have also been linked to a heightened risk [6].