%0 Journal Article %A Leanne M. Ward %T Vitamin D deficiency in the 21st century: a persistent problem among Canadian infants and mothers %D 2005 %R 10.1503/cmaj.050177 %J Canadian Medical Association Journal %P 769-770 %V 172 %N 6 %U https://www.cmaj.ca/content/cmaj/172/6/769.full.pdf