1 Department of Public Health and Clinical Medicine, Umeå University, Sweden; Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Sweden.
2 Department of Public Health and Clinical Medicine, Kiruna research unit, Umeå University, Sweden. Electronic address: [email protected].
3 Department of Medical Sciences, Cardiology, Uppsala University, Sweden.
4 Department of Cardiology, Clinical Sciences, Lund University, Sweden.
5 Department of Public Health and Clinical Medicine, Umeå University, Sweden.