1. An evidence-based medicine approach to studies of diagnostic tests: Assessing the validity of virtual colonoscopy 
Brooks D. Cash, Philip Schoenfeld, Douglas Rex 
Clinical Gastroenterology and Hepatology 
Volume 1, Issue 2, Pages (March 2003)
DOI: /cgh
Copyright © 2003 American Gastroenterological Association Terms and Conditions

2. Fig. 1
Sequence in appraisal of the validity and applicability of a diagnostic test to your patient and your practice setting.
Clinical Gastroenterology and Hepatology 2003 1, DOI: ( /cgh )
Copyright © 2003 American Gastroenterological Association Terms and Conditions

3. Fig. 2 Nomogram for likelihood ratios. Reprinted with permission.5
Clinical Gastroenterology and Hepatology 2003 1, DOI: ( /cgh )
Copyright © 2003 American Gastroenterological Association Terms and Conditions