Kokko, Riitta-Liisa http://orcid.org/0000-0001-7472-8617
Hänninen, Kaija http://orcid.org/0000-0002-2186-6757
Törrönen, Maritta http://orcid.org/0000-0002-4487-9315
Article History
Received: 17 June 2020
Accepted: 31 July 2020
First Online: 10 August 2020