Funding for this research was provided by:
Received: 7 January 2020
Accepted: 8 June 2020
First Online: 26 June 2020
Ethics approval and consent to participate
: The study was approved by the Regional Ethics Review Board of Uppsala (Dnr 2004:M-270). Written informed consent was obtained from the single adult patient and from all parents to the affected children included in the study.
: Not applicable.
: The authors declare that they have no competing interests.