13 febrero 2015
Residents of snowy, northern U.S. cities are at risk of vitamin D deficiency and worse, may not even know it. During Buffalo’s winter months, nearly 50 percent of people have insufficient amounts of vitamin D and 25 percent may be considered deficient.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/aaBuXIKPhZY/150213164719.htm
