PT - JOURNAL ARTICLE AU - Winston Koo TI - Study of the effect of calcium supplementation during pregnancy on the risk of preterm birth or low birthweight infants is inconclusive AID - 10.1136/ebmed-2012-100778 DP - 2012 Dec 01 TA - Evidence Based Medicine PG - 186--187 VI - 17 IP - 6 4099 - http://ebm.bmj.com/content/17/6/186.short 4100 - http://ebm.bmj.com/content/17/6/186.full SO - Evid Based Med2012 Dec 01; 17