RT Journal Article SR Electronic T1 LNG may still be the most cost-effective oral emergency contraception method JF Journal of Family Planning and Reproductive Health Care JO J Fam Plann Reprod Health Care FD British Medical Journal Publishing Group SP 121 OP 122 DO 10.1136/jfprhc.2011.0070 VO 37 IS 2 A1 Pittrof, Rudger A1 Sauer, Ulrike A1 Ikram, Palwasha YR 2011 UL http://jfprhc.bmj.com/content/37/2/121.abstract AB