1. From the Hospital for Children and Adolescents, University of Helsinki, Helsinki, Finland (MK and HKÅ); Helsinki University Central Hospital, Helsinki, Finland (MK); Folkhälsan Research Center, Helsinki, Finland (MK); the Department of Pediatrics (MK) and Tampere University Hospital Research Unit (SMV), Tampere University Hospital, Tampere, Finland; Nutrition Unit, National Institute for Health a