TY - STAND AU - S. Varney AU - J. Guest BT - Pharmacoeconomics M1 - 17 PY - 2004 SP - 1141 EP - 51 T2 - Pharmacoeconomics TI - Relative cost effectiveness of Depo-Provera, Implanon, and Mirena in reversible long-term hormonal contraception in the UK VL - 22 SN - 1170-7690 (Print) 1170-7690 ER -