title: Attracting and retaining participants: a checklist.
authors.forename: William
authors.initials: W
authors.lastname: Atkinson
mesh_terms: D019468:Disease Management; D006801:Humans; D007407:Interviews as Topic; D008329:Managed Care Programs / Q000458:organization & administration*; D010358:Patient Participation / Q000523:psychology*; D014481:United States