Use of evidence to solve a health problem. Distribution of answers to the question: "what type of resources do you use to solve a specific health problem?" in the different medical student groups. (M4=4th year students with no evidence-based medicine training; M5 EBM and M5 non-EBM=5th year medical students with and without the evidence-based medicine course; M6=6th year students exposed to the evidence-based medicine course during the year prior to assessment; EBM=Evidence-Based Medicine; ACPJC=American College of Physicians Journal Club). * =P<0.01 Mann–Whitney U test for the M5 vs. M5 non-EBM comparison.*** = P<0.001 Mann–Whitney U test for the M5 vs. M5 non-EBM comparison.