Alakärppä, Antti I.
Koskenkorva, Timo J.
Koivunen, Petri T.
Alho, Olli-Pekka
Article History
Received: 20 November 2017
Accepted: 26 February 2018
First Online: 28 February 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest or external funding.