1. A primer on the precision and accuracy of the clinical examination;Sackett;JAMA J Am Med Assoc,1992
2. Incorporating patient and family preferences into evidence-based medicine;Siminoff;BMC Med Inform Decis Mak,2013
3. Levels of evidence and grades of recommendations;Ball;Centre for Evidence-Based Medicine Oxford-Centre for Evidence Based Medicine,1998
4. The periodic health examination. Canadian Task Force on the Periodic Health Examination;Can Med Assoc J,1979
5. Identifying and avoiding bias in research;Pannucci;Plast Reconstr Surg,2010