Funding for this research was provided by:
Helsinki University Hospital Clinical Research Funding (TYH2017241, Y102011091)
Academy of Finland (317061)
Received: 3 December 2019
Accepted: 13 April 2020
First Online: 28 April 2020
Ethics approval and consent to participate
: The Ethics Committee of the Department of Surgery in Helsinki University Hospital approved the study (18/13/03/02/2010). Each participant or his/her proxy gave a written informed consent, and withdrawing from the study was possible at any time.
: Not applicable.
: The authors declare that they have no competing interests.