These are useful tools and checklists when assessing studies for a systematic review:
* SBU uses a version translated to Swedish.
** SBU do not use CASP. Instead a checklist developed by SBU is used, only available in Swedish.
*** SBU uses a version translated to Swedish, with a question added regarding conflict of interest.
**** Checklist developed by SBU based on Tong et al, 2012.