Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK. Department of Cardiology, Centre for Cardiac, Vascular, Pulmonary and Infectious Diseases, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark. The research unit PROgrez, Department of Physiotherapy and Occupational Therapy, Næstved-Slagelse-Ringsted Hospitals, Slagelse, Denmark. Department of Regional Health Research, University of Southern Denmark, Odense, Denmark. Faculty of Health and Medical Sciences, Copenhagen University, Copenhagen, Denmark. The Heart Centre, University Hospital Rigshospitalet, Copenhagen, Denmark. Institute for Nursing and Nutrition, University College Copenhagen, Copenhagen, Denmark. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 7812, Copenhagen University Hospital, Copenhagen, Denmark. MRC/CSO Social and Public Health Sciences Unit & Robertson Centre for Biostatistics, Institute of Health and Well Being, University of Glasgow, Glasgow, UK. Department of Cardiac, Thoracic and Vascular Surgery, Odense University Hospital, Odense, Denmark. REHPA, The Danish Knowledge Centre for Rehabilitation and Palliative Care, Odense University Hospital, Nyborg, Denmark. Department of Clinical Research, University of Southern Denmark, Odense, Denmark.