D-fense! Advocating the Need for the Vitamin During the Winter Months.
D006801:Humans; D012621:Seasons; D013472:Sunlight; D014807:Vitamin D / Q000627:therapeutic use*; D014808:Vitamin D Deficiency / Q000517:prevention & control; D014815:Vitamins / Q000627:therapeutic use*
D014815:Vitamins; D014807:Vitamin D