Funding for this research was provided by:
Swedish Research Council (K2005-72X-11242-11A)
Article History
Received: 12 July 2018
Revised: 14 December 2018
Accepted: 18 December 2018
First Online: 7 January 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The ABIS study was approved by the Research Ethics Committees of the Faculty of Health Sciences, Linköping University, and the Medical Faculty of Lund University. Informed consent was obtained from all parents in the study.