The performance of levonorgestrel rod and Norplant contraceptive implants: a 5 year randomized study.
Sivin I, Campodonico I, Kiriwat O, Holma P, Diaz S, Wan L, Biswas A, Viegas O, el din Abdalla K, Anant MP, Pavez M, Stern J.
Sivin I, et al. Among authors: campodonico i.
Hum Reprod. 1998 Dec;13(12):3371-8. doi: 10.1093/humrep/13.12.3371.
Hum Reprod. 1998.
PMID: 9886517
Clinical Trial.