Pyukkenen, V. P.
Pendinen, G. I.
Mitrofanova, O. P.
Article History
Received: 27 March 2019
Revised: 31 May 2019
Accepted: 13 June 2019
First Online: 21 November 2019
COMPLIANCE WITH ETHICAL STANDARDS
: The authors declare that they have no conflict of interest. This article does not contain any studies involving animals or human participants performed by any of the authors.