1. Deficiency;Hollick;N Engl J Med,2007
2. Vitamin D status in healthy Indians aged 50years and above;Marwaha;J Assoc Physicians India,2011
3. Vitamin D and bone mineral density of healthy school children in northern India;Marwaha;Ind J Med Res,2008
4. Vitamin D status in India – its implications and remedial measures;Harinarayan;J Assoc Physicians India,2009
5. Deficiency and secondary hyperparathyroidism in the elderly: consequences for bone loss and fractures and therapeutic implications;Lips;Endocr Rev,2001