1. Department of Public Health and Clinical MedicineUnit of MedicineUmeå UniversityUmeåSweden
2. Department of Molecular Medicine and SurgerySection of Clinical PhysiologyKarolinska Institute and Department of Clinical PhysiologyKarolinska University HospitalStockholmSweden
3. Department of Internal Medicine IIDivision of CardiologyVienna General HospitalMedical University of ViennaViennaAustria
4. Department of Public Health and Clinical MedicineSection of Sustainable HealthUmeå UniversityUmeåSweden