Funding for this research was provided by:
Stiftelsen Acta Oto-Laryngologica (no nr)
Stiftelsen Frimurare Barnhuset i Stockholm (no nr)
Stiftelsen Samariten (no nr)
Article History
Received: 6 June 2019
Accepted: 16 July 2019
First Online: 3 August 2019
Compliance with ethical standards
:
: The authors declare that they have no conflicts of interest. All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers' bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.
: All procedures performed in studies involving human participants 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.
: Informed consent was obtained from all individual participants included in the study.