title: Use of lay opinion leaders to promote diffusion of health innovations in a community programme: lessons learned from the North Karelia project.
mesh_terms: D005387:Finland; D006293:Health Promotion / Q000379:methods / Q000458:organization & administration*; D006331:Heart Diseases / Q000517:prevention & control; D006801:Humans; D011639:Public Opinion; D014838:Volunteers