RT Journal Article SR Electronic T1 Low-calorie sweeteners and the risk of preterm delivery: results from two studies and a meta-analysis JF Journal of Family Planning and Reproductive Health Care JO J Fam Plann Reprod Health Care FD British Medical Journal Publishing Group SP 12 OP 13 DO 10.1136/jfprhc-2012-100545 VO 39 IS 1 A1 Carlo La Vecchia YR 2013 UL http://jfprhc.bmj.com/content/39/1/12.abstract AB