1. From the Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands (J.T., A.v.d.P., I.T.K., R.A.d.B., W.H.v.G., A.A.V., D.J.v.V., P.v.d.M.); and Department of Social and Welfare Studies, Faculty of Health Sciences, Linköping University, Norrköping, Sweden (T.J.).