Fig. 1From: Consistency and sources of divergence in recommendations on screening with questionnaires for presently experienced health problems or symptoms: a comparison of recommendations from the Canadian Task Force on Preventive Health Care, UK National Screening Committee, and US Preventive Services Task ForceFlow of guideline and recommendation statements reviewed and included, randomized controlled trials described in the statements, and results of randomized controlled trials that were tests of questionnaire-based screening interventionsBack to article page