Authors: SIVIN I STERN J MCCARTHY T DIAZ J ELMAHGOUB S LACARRA M SHOUPE D MISHELL DR MATTOS CER COUTINHO E ALVAREZ F BRACHE V PAVEZ M DIAZ S

Citation: I. Sivin et al., HEALTH DURING PROLONGED USE OF LEVONORGESTREL 20 MU-G D AND THE COPPER TCU 380AG INTRAUTERINE CONTRACEPTIVE DEVICES - A MULTICENTER STUDY/, Fertility and sterility, 61(1), 1994, pp. 70-77