Critical Appraisal Skills Programme (CASP) CASP Cohort Study Checklist. Available from URL: http://media.wix.com/ugd/dded87_e37a4ab637fe46a0869f9f977dacf134.pdf

Scottish Intercollegiate Guidelines Network (SIGN). Methodology Checklist 3: Cohort Studies. Edinburgh: SIGN. [cited 12 Apr 2016]. Available from URL: http://www.sign.ac.uk/methodology/checklists/20121210_Checklist_for_cohort_studies.rtf  Notes: http://www.sign.ac.uk/methodology/checklists/20121210_Notes_on_cohort_studies_checklist.docx