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Interventions for emergency contraception.
Shen J, Che Y, Showell E, Chen K, Cheng L. Shen J, et al. Among authors: showell e. Cochrane Database Syst Rev. 2017 Aug 2;8(8):CD001324. doi: 10.1002/14651858.CD001324.pub5. Cochrane Database Syst Rev. 2017. PMID: 28766313 Free PMC article. Updated. Review.
Clinical trial registration was not an indicator for low risk of bias.
Farquhar CM, Showell MG, Showell EAE, Beetham P, Baak N, Mourad S, Jordan VMB. Farquhar CM, et al. Among authors: showell eae. J Clin Epidemiol. 2017 Apr;84:47-53. doi: 10.1016/j.jclinepi.2016.11.011. Epub 2017 Jan 11. J Clin Epidemiol. 2017. PMID: 28088595 Review.
Interventions for emergency contraception.
Shen J, Che Y, Showell E, Chen K, Cheng L. Shen J, et al. Among authors: showell e. Cochrane Database Syst Rev. 2019 Jan 20;1(1):CD001324. doi: 10.1002/14651858.CD001324.pub6. Cochrane Database Syst Rev. 2019. PMID: 30661244 Free PMC article.