Cite
MLA Citation
Jeffrey T. Jensen et al.. “Contraceptive Efficacy and Safety of 52 mg Levonorgestrel-Releasing Intrauterine Systems During Years 6–8 of Use: Data From the Mirena Extension Trial [A13].” Obstetrics and gynecology, vol. 139, n.d., p. 4S. http://access.bl.uk/ark:/81055/vdc_100156698732.0x000042