What components of chronic care organisation relate to better primary care for coronary heart disease patients? An observational study - Van Lieshout, Jan (Radboud University Nijmegen Medical Centre. Scientific Institute for Quality of Health Care) ; Frigola-Capell, Eva (Universitat Autònoma de Barcelona. Institut Universitari Avedis Donabedian) ; Ludt, Sabine (Department of General Practice and Health Services Research. University Hospital of Heidelberg) ; Grol, Richard (Radboud University Nijmegen Medical Centre. Scientific Institute for Quality of Health Care) ; Wensing, Michel (Radboud University Nijmegen Medical Centre. Scientific Institute for Quality of Healthcare)