Affiliation: | a Unit of Lung & Allergy Research, National Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden b Department of Allergy, Hanoi Medical University, Hanoi, Viet Nam c Department of Allergy and Clinical Immunology, Bachmai Hospital, Hanoi, Viet Nam d Department of Scientific Research, Hanoi Medical University, Hanoi, Viet Nam e The OLIN Studies, Department of Medicine, Sunderby Hospital of Norrbotten, Luleå, Sweden f Department of Public Health and Clinical Medicine, University of Umeå, Umeå, Sweden g Department of Internal Medicine, Krefting Research Centre, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden h Epidemiological Field Laboratory of Bavi, Hanoi Medical University, Hanoi, Viet Nam |