Vitamin D mangel og skjoldbruskkjertelsykdommer
http://www.goodhormonehealth.com/VitaminD.pdf

Sunlight and vitamin D for bone health and prevention of autoimmune diseases, cancers, and cardiovascular disease.
http://www.ncbi.nlm.nih.gov/pubmed/15585788

The 2011 Report on Dietary Reference Intakes for Calcium and Vitamin D from the Institute of Medicine: What Clinicians Need to Know
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3046611/