1. Faculty of medicine; Department of Medical Imaging and Circulation; Norwegian University of Science and Technology; Trondheim Norway
2. Department of Cardiology; St. Olav's University Hospital; Trondheim Norway
3. Morbid Obesity Center; Division of Medicine; Department of Endocrinology; Vestfold Hospital Trust; Tønsberg Norway
4. Asgardstrand General Practice; Horten Norway
5. Department of Medicine; Levanger Hospital; Nord-Trøndelag Hospital Trust; Levanger Norway