1. Department of Health Promoting Science Sophiahemmet University Stockholm Sweden
2. Department of Clinical Sciences Danderyd Hospital, Karolinska Institutet Stockholm Sweden
3. Swedish Red Cross University Huddinge Sweden
4. Unit for Experimental Asthma and Allergy Research, Institute of Environmental Medicine Karolinska Institutet Stockholm Sweden
5. Ersta Sköndal Bräcke University College Stockholm Sweden