Funding for this research was provided by:
There was no funder (There was no funder)
Article History
Received: 3 April 2016
Accepted: 29 January 2018
First Online: 8 March 2018
Ethics approval and consent to participate
: The study was approved by the Regional Ethical Review Board in Lund with the registration number 2010/49. The parents were informed about the study both by letter and orally, and gave consent to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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