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14. [Contraceptive development--the view from the U.S.A. in the mid 80s]. Potts M, Siemens A, Burton N. Contracept Fertil Sex (Paris); 1986 Mar 28; 14(3):247-51. PubMed ID: 12268061 [Abstract] [Full Text] [Related]
15. Progestin-only ECPs on the way to the U.S. Contracept Technol Update; 1999 Mar 28; 20(3):28-9. PubMed ID: 12321963 [Abstract] [Full Text] [Related]