Hello there,

Would anybody be able to recommend a critical appraisal checklist or tool that would be suitable to use on a retrospective observational study (e.g. one that could be used on a study such as this one: http://hsr.sagepub.com/content/early/2016/05/05/1355819616649630.abstract)

Any help would be much appreciated!

Thanks,

Hong-Anh