%0 Journal Article %T Overcoming ethical barriers to research %A Helen E Machin %A Steven M Shardlow %J Research Ethics %@ 2047-6094 %D 2018 %R 10.1177/1747016117739938 %X Researchers engaged in studies about ¡®hidden social groups¡¯ are likely to face several ethical challenges. Using a study with undocumented Chinese migrants in the UK, challenges involved in obtaining approval by a university research ethics committee are explored. General guidance about how to resolve potential research ethics issues, with particular reference to ¡®hidden social groups¡¯, prior to submission to a research ethics committee is presented %K research ethics %K hidden social groups %K qualitative research %K undocumented migrants %K Chinese migrants %U https://journals.sagepub.com/doi/full/10.1177/1747016117739938