1. Perinatal Epidemiology Research Unit; Department of Pediatrics; Aarhus University Hospital; Aarhus N; Denmark
2. Department of Public Health; Section of Epidemiology; University of Aarhus; Aarhus C; Denmark
3. Mood Disorders Research Unit; Aarhus University Hospital; Risskov; Denmark
4. Institute of Pathology; Aarhus University Hospital; Aarhus C; Denmark