title: Quality evidence important for quality guidelines.
authors.forename: Jan
authors.initials: J
authors.lastname: Matthys
authors.forename: Marc
authors.initials: M
authors.lastname: De Meyere
mesh_terms: D015179:Colorectal Neoplasms / Q000517:prevention & control; D019317:Evidence-Based Medicine; D006801:Humans; D008403:Mass Screening / Q000592:standards; D010612:Pharyngitis / Q000628:therapy; D017410:Practice Guidelines as Topic / Q000592:standards*