参考
1. Madden A, Aslam A, Nusrat N. A Case of Migrating "Saf-T-Coil" Presenting With a Vesicovaginal Fistula and Vesicovaginal Calculus. Urol Case Rep. 2016;7:17-9. doi:10.1016/j.eucr.2016.03.014 - Pubmed
2. Manufacturer Halts Saf-T-Coil Production. Contracept Technol Update. 1982;3(9):109-10. - Pubmed
3. Bolognese R, Corson S, Piver M. The Saf-T-Coil, an IUD. Fertil Steril. 1968;19(6):957-9. doi:10.1016/s0015-0282(16)36850-9
4. https://mhc.andornot.com/en/permalink/artifact9737