[Some thoughts on clinical family planning studies].
Wu
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Cao
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D006063:Chorionic Gonadotropin / Q000276:immunology; D005193:Family Planning Services; D006801:Humans; D007434:Intrauterine Devices; D012107:Research Design; D014612:Vaccines
D006063:Chorionic Gonadotropin; D014612:Vaccines