title: A study on use-effectiveness and extended use-effectiveness of contraceptive methods based on a program directed towards women having taken oral contraceptives in Seoul, Korea.
authors.lastname: Kwon E-h
authors.lastname: Park T-r
authors.forename: A
authors.initials: A
authors.lastname: Kang H-j  Et
mesh_terms: D003267:Contraception; D003276:Contraceptives, Oral; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D007434:Intrauterine Devices; D007723:Korea; D010352:Patient Dropouts
chemical_list: D003276:Contraceptives, Oral