1. Department of Women′s and Children′s Health; Uppsala University; Sweden
2. Centre for Clinical Research Sörmland; Uppsala University; Sweden
3. Department of Paediatrics; Mälarsjukhuset Hospital; Eskilstuna Sweden
4. Department of Paediatrics; Skaraborg Hospital; Skövde Sweden
5. Centre for Research and Development; Skaraborg Hospital; Skövde Sweden
6. School of Health and Medical Sciences; Örebro University; Sweden
7. The Gillberg Neuropsychiatry Centre; Sahlgrenska Academy; University of Gothenburg; Sweden