%0 Journal Article %A Winston Koo %T Study of the effect of calcium supplementation during pregnancy on the risk of preterm birth or low birthweight infants is inconclusive %D 2012 %R 10.1136/ebmed-2012-100778 %J Evidence Based Medicine %P 186-187 %V 17 %N 6 %U https://ebm.bmj.com/content/ebmed/17/6/186.full.pdf