PT  - JOURNAL ARTICLE
ED - BMJ Publishing Group Ltd
TI  - Review: the levonorgestrel releasing intrauterine system prevents more pregnancies than intrauterine devices (IUDs) ≤250 mm<sup>2</sup> but not IUDs >250 mm<sup>2</sup>
AID  - 10.1136/ebm.6.5.137
DP  - 2001 Sep 01
TA  - Evidence Based Medicine
PG  - 137--137
VI  - 6
IP  - 5
4099  - http://ebm.bmj.com/content/6/5/137.short
4100  - http://ebm.bmj.com/content/6/5/137.full
SO  - Evid Based Med2001 Sep 01; 6