1. Department of Respiratory Medicine Skåne University HospitalLund University Malmö Sweden
2. Department of Clinical Sciences Lund, Respiratory Medicine and Allergology Faculty of Medicine Lund University Lund Sweden
3. Division of Medicine Department of Public Health and Clinical Medicine Umeå University Umeå Sweden
4. The OLIN Unit Division of Occupational and Environmental Medicine Department of Public Health and Clinical Medicine Umeå University Umeå Sweden
5. Department of Clinical Sciences Skåne University HospitalLund University Lund Sweden