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Chinese Journal of Medical Education, Volume 37, Issue 1,2017, Pages 102-106, doi:10.3760/cma.j.issn.1673-677X.2017.01.022
Chinese Journal of Medical Education, Volume 37, Issue 1,2017, Pages 57-60,138, doi:10.3760/cma.j.issn.1673-677X.2017.01.012