1. Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden;
2. Centre for Occupational and Environmental Medicine, Stockholm County Council, Stockholm, Sweden;
3. Department of Medical Sciences: Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden;
4. Institute of Environmental Medicine, Karolinska Institutet, Solna, Sweden;
5. Sachs’ Children and Youth Hospital, Stockholm, Sweden