Department of Cardiology;
Linkoping University Hospital;
Linkoping;
Sweden;
Department of Medicine and Care;
Division of Cardiovascular Medicine;
Faculty of Health Sciences;
Linkoping University;
Linkoping;
Sweden;
Division of Clinical Neurophysiology;
Linkoping University Hospital;
Linkoping;
Sweden;
Department of Neuroscience and Locomotion;
Faculty of Health Sciences;
Linkoping University;
Linkoping;
Sweden;
Congestive Heart Failure; Insomnia Disorders; Depressive Symptoms;