1. Department of Epidemiology, School of Public Health, Center for Human Growth and Development, University of Michigan, Ann Arbor2Clinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
2. Neuropediatric Unit, Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
3. Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor
4. Clinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden5Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
5. Clinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden