Sources:
American Academy of Dermatology. "Vitamin D Fact Sheet."
Gilchrest, BA. "The a-B-C-ds of sensible sun protection." Skin Therapy Letter. 13(2008): 1-5.
Gilchrest, BA. "Sun protection and Vitamin D: three dimensions of obfuscation." Journal of Steroid Biochemistry and Molecular Biology. 103(2007): 655-63.
Holick, MF. "Vitamin D deficiency." New England Journal of Medicine. 357(2007): 266-81.
Wolpowitz, D, and BA Gilchrest. "The vitamin D questions: how much do you need and how should you get it?" Journal of the American Academy of Dermatology. 54(2006): 301-17.
