Breath Analysis as an Additional Test for Colorectal Cancer Screening to Reduce the Number of Unnecessary Colonoscopies

All participants will be asked to breathe into an electronic nose (eNose, the AeonoseTM, The eNose Company, Zutphen, the Netherlands) for 5 minutes during the pre-colonoscopy intake and just prior to the procedure to assess reproducibility (with \>2 weeks in between).