1. Folkhälsan Research Center; and University of Helsinki, Helsinki, Finland
2. Tampere University, Tampere, Finland
3. Finnish Institute for Health and Welfare, Helsinki, Finland; University of Turku, Turku, Finland; Academic Primary Health Care Centre, Stockholm, Sweden; and Karolinska Institutet, Stockholm, Sweden
4. Children’s Hospital, University of Helsinki, Helsinki, Finland
5. Helsinki University Central Hospital, Helsinki, Finland
6. Children’s Hospital, University of Helsinki; Helsinki University Hospital, Helsinki, Finland; and Minerva Foundation Institute for Medical Research, Helsinki, Finland