1 Section for Sustainable Health/the OLIN Unit, Department of Public Health and Clinical Medicine, Umeå University, Sweden. Electronic address: Helena.backman@norrbotten.se.
2 Section for Sustainable Health/the OLIN Unit, Department of Public Health and Clinical Medicine, Umeå University, Sweden.
3 Department of Respiratory Medicine, Seinäjoki Central Hospital, Wellbeing Services County of South Ostrobothnia, Seinäjoki, Finland; Tampere University Respiratory Research Group, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland; Krefting Research Center, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
4 Department of Public Health and Clinical Medicine, Umeå University, Sweden.
5 Karolinska Severe Asthma Center, Department of Respiratory Medicine and Allergy, Karolinska University Hospital, Stockholm, Sweden; Division of Lung and Airway Research, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.