1 Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.
2 Allergy Centre, Tampere University Hospital, Tampere, Finland.
3 Tampere Center for Child Health Research, University of Tampere, Tampere, Finland.
4 Department of Paediatrics, Tampere University Hospital, Tampere, Finland.
5 Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
6 Department of Pediatrics and Child Health, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.
7 Children's Hospital Research Institute of Manitoba, Winnipeg, Manitoba, Canada.
8 Department of Food and Human Nutritional Sciences, Faculty of Agricultural and Food Sciences, University of Manitoba, Winnipeg, Manitoba, Canada.
9 Faculty of Social Sciences, Tampere University, Tampere, Finland.
10 School of Applied Psychology, University College Cork, Cork, Ireland.
11 General Practitioners Research Institute, Groningen, the Netherlands.
12 University Medical Center Groningen, Groningen Research Institute Asthma and COPD (GRIAC), University of Groningen, Groningen, the Netherlands.
13 Department of Pediatric Pulmonology and Pediatric Allergology, University Medical Center Groningen, Beatrix Children's Hospital, University of Groningen, Groningen, the Netherlands.