Meyer-Rochow, Victor Benno
Hakko, Tapani http://orcid.org/0000-0002-0357-446X
Hakko, Helinä http://orcid.org/0000-0003-0938-797X
Riipinen, Pirkko
Timonen, Markku
Article History
Received: 9 January 2020
Revised: 16 April 2020
Accepted: 28 April 2020
First Online: 13 May 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.