Heiskala, Marja
Leidenius, Marjut
Joensuu, Kristiina
Heikkilä, Päivi
Funding for this research was provided by:
Helsinki University Central Hospital Research Foundation (TYH2016214)
Article History
Received: 23 May 2018
Revised: 26 August 2018
Accepted: 24 September 2018
First Online: 27 October 2018
Compliance with ethical standards
: The Ethics Committee of the Helsinki University Central Hospital approved the study protocol.
: The authors declare that they have no conflict of interest.