Vitamin D status of the elderly: contributions of sunlight exposure and diet.
D000328:Adult; D000368:Aged; D004032:Diet; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012621:Seasons; D012867:Skin / Q000378:metabolism; D013472:Sunlight; D014807:Vitamin D / Q000096:biosynthesis / Q000378:metabolism*
D014807:Vitamin D