Affiliation: | a The Medical Research Unit of Ringkjoebing County, Ringkjoebing, Denmark;b The Cardiologic Department, Aarhus University Hospital, Skejby, Denmark;c Medical Department, Herning Central Hospital, Herning, Denmark;d The Panum Institute, University of Copenhagen, Copenhagen, Denmark;e The Institute of General Practice and the Research Unit for General Practice, Aarhus University, Aarhus, Denmark |