1. A practical approach to hypercalcemia;Carroll;Am Fam Physician,2003
2. Clinical review: rare causes of hypercalcemia;Jacobs;J Clin Endocrinol Metab,2005
3. Non-parathyroid hypercalcemia;Horwitz,2008
4. Hypercalcemia due to vitamin D toxicity;Rubin,2005
5. Vitamin D deficiency;Holick;N Engl J Med,2007