Funding for this research was provided by:
Opetus- ja Kulttuuriministeriö (63/627/2008, 43/627/2007, 79/627/2009)
Academy of Finland (328818, 321336, 286536)
Received: 27 January 2020
Accepted: 3 June 2020
First Online: 9 June 2020
Ethics approval and consent to participate
: All participants gave their written informed consent and permission to review their medical records prior to participation in the study. The study was approved by the Ethics Committee of the Central Finland Health Care District (Dnro56/2007) and conformed with the principles of the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.