Funding for this research was provided by:
Stockholm County Council (ALF)
Norrbacka-Eugeniastiftelsen
Article History
Received: 5 February 2018
Accepted: 6 August 2018
First Online: 22 August 2018
Ethics approval and consent to participate
: The Regional Ethics Committee in Stockholm approved the study (Daybook no. 2014/254–31). All participants and/or their legal guardians signed informed-consent forms.
: Consent for publication of individual photographs and radiographs was obtained.
: The authors declare that they have no competing interests..
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