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Hadiati DR, Hakimi M, Nurdiati DS, Masuzawa Y, da Silva Lopes K, Ota E.Hadiati DR, et al.Cochrane Database Syst Rev. 2020 Jun 25;6(6):CD007462. doi: 10.1002/14651858.CD007462.pub5.Cochrane Database Syst Rev. 2020.PMID: 32580252Free PMC article.
Short J, McDonald S, Turner T, Martis R; SEA-ORCHID Study Group.Short J, et al.BMC Med Educ. 2010 May 22;10:37. doi: 10.1186/1472-6920-10-37.BMC Med Educ. 2010.PMID: 20492706Free PMC article.