Renkonen, Suvi http://orcid.org/0000-0003-1240-0661
Lindén, Riikka
Bäck, Leif
Silén, Robert
Mäenpää, Hanna
Tapiovaara, Laura
Aro, Katri
Funding for this research was provided by:
Sigrid Juséliuksen Säätiö
Jane ja Aatos Erkon Säätiö
Korvatautiensäätiö
Article History
Received: 10 March 2017
Accepted: 22 August 2017
First Online: 2 September 2017
Compliance with ethical standards
:
: This study has been supported by the Sigrid Jusélius Foundation, Jane and Aatos Erkko Foundation, and the Finnish Otorhinolaryngology Research Foundation.
: The authors declare that they have no conflict of interest.
: 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. For this type of study, formal consent is not required.