Downs SH and Black N. The feasibility of creating a checklist for the assessment of the methodological quality both of randomised and non-randomised studies of health care interventions. J Epidemiol Community Health (1998); 52:377-384.
Evidence-Based Medicine Working Group (1992): A new approach to teaching the practice of medicine. JAMA: The Journal of the American Medical Association 268: 2420-2425.
Fitzpatrick R, Davey C, Buxton MJ, Jones DR. Evaluation of patient-based outcome measures for use in clinical trials. Health Technology Assessment 1998;2:1 – 74.
Foley NC, Bhogal SK, Teasell RW, Bureau Y, Speechley MR. Estimates of quality and reliability with the physiotherapy evidence-based database scale to assess the methodology of randomized controlled trials of pharmacological and nonpharmacological interventions. Phys Ther. 2006;86:817-24.
Hopewell S, Clarke M, Lefebvre C, Scherer R. Handsearching versus electronic searching to identify reports of randomized trials. The Cochrane Database of Methodology Reviews 2002, Issue 4. Art. No. MR000001.
Maher CG, Sherrington C, Herbert RD, Moseley AM, Elkins M. Reliability of the PEDro scale for rating quality of randomized controlled trials. Phys Ther. 2003;83:713-21.