Airas, Laura
Rissanen, Eero
Rinne, Juha O.
Article History
Received: 27 August 2015
Accepted: 22 September 2015
First Online: 19 October 2015
Compliance with ethical standards
:
: Laura Airas, Eero Rissanen and Juha Rinne declare no conflict of interest.
: The article does not contain any studies with human or animal subjects performed by any of the authors.