1. Microscopic colitis;Pardi;Gastroenterology,2011
2. What is “quality of evidence” and why is it important to clinicians?;Guyatt;BMJ,2008
3. Higgins JPT, Altman DG, Sterne JAC (eds). Chapter 8: Assessing risk of bias in included studies. In: Higgins JPT, Grees S, eds. Cochrane handbook for systematic reviews of interventions, version 5.1.0 (updated March 2011) 2011. The Cochrane Collaboration, 2011. www.cochrane-handbook.org.
4. Reitsma JB, Rutjes AWS, Whiting P, et al (eds). Chapter 9: Assessing methodological quality. In: Deeks JJBP, Gatsonis C, eds. Cochrane handbook for systematic reviews of diagnostic test accuracy, version 1.0.0. The Cochrane Collaboration, 2009. http://srdta.cochrane.org/.
5. Grading quality of evidence and strength of recommendations for diagnostic tests and strategies;Schunemann;BMJ,2008