| 题名 | Comparing the health risks and benefits of contraceptive choices. |
| 杂志 | Fam Plann Perspect. |
| 年|卷|期 | 1991 Mar-Apr;23(2): |
| 页码 | 54-61. |
| 链接 | http://www.ncbi.nlm.nih.gov/pubmed/?term=Harlap+S%2C+Kost+K%2C+Forrest+JD++1991 |
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