Valtonen, Olli http://orcid.org/0000-0001-9423-0269
Ormiskangas, Jaakko
Kivekäs, Ilkka
Rantanen, Ville
Dean, Marc
Poe, Dennis
Järnstedt, Jorma
Lekkala, Jukka
Saarenrinne, Pentti
Rautiainen, Markus http://orcid.org/0000-0002-5905-0059
Funding for this research was provided by:
The Finnish ORL-HNS Foundation
Tampereen Tuberkuloosisäätiö
Väinö ja Laina Kivi Foundation
Article History
Received: 10 September 2019
Accepted: 2 January 2020
First Online: 16 January 2020
Competing interests
: The authors declare no competing interests.