Funding for this research was provided by:
Regional Research Council Uppsala-Örebro (RFR-226161, RFR-462701)
Center for Clinical Research Dalarna – Uppsala University (CKFUU-105141, CKFUU-374651, CKFUU-566761)
Swedich Society of Medicine (SLS-498901, SLS-93191)
Text and Data Mining valid from 2018-06-11
Received: 29 June 2017
Accepted: 1 June 2018
First Online: 11 June 2018
Ethics approval and consent to participate
: All procedures performed in this study involving human participants (children) were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Approval of the study was obtained from the Regional Ethical Review Board in Uppsala, Sweden (Dnr 2010/106). Written informed consent was received from all parents/guardians.
: The authors declare that they have no competing interests.
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