Two mifepristone doses and two intervals of misoprostol administration for termination of early pregnancy: a randomised factorial controlled equivalence trial.
von Hertzen H, Piaggio G, Wojdyla D, Marions L, My Huong NT, Tang OS, Fang AH, Wu SC, Kalmar L, Mittal S, Erdenetungalag R, Horga M, Pretnar-Darovec A, Kapamadzija A, Dickson K, Anh ND, Tai NV, Tuyet HT, Peregoudov A; WHO Research Group on Post-ovulatory Methods of Fertility Regulation.
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BJOG. 2009 Feb;116(3):381-9. doi: 10.1111/j.1471-0528.2008.02034.x.
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PMID: 19187370
Clinical Trial.