16. Holick MF. VDD. N Engl J Med. 2007;357:266–281.
17. Schoenmakers I, Goldberg GR, Prentice A. Abundant
sunshine and VDD. Br J Nutr. 2008;99:1171–1173.
18. In: DRI, Dietary Reference Intakes: For Calcium, Phosphorus,
Magnesium, Vitamin D, and fluoride. Washington, D.C:
National Academy Press; 1997:250.
19. Wang T, Bengtsson G, Kärnefelt I, et al. Provitamins and
vitamins D2 and D3 in Cladina spp. over a latitudinal
gradient: possible correlation with UV levels. J Photochem
Photobiol B Biol. September 2001;62:118–122.
20. Holick MF. The VD epidemic and its health consequences. J
Nutr. 2005;135:. 2739S–48S.