Funding for this research was provided by:
Sigrid Juséliuksen Säätiö
Helsinki University Hospital
Finnish Cancer Foundation
HUSLAB, Helsinki University Hospital
Helsinki University Central Hospital Research Funds
Received: 9 May 2019
Accepted: 21 July 2019
First Online: 5 August 2019
Ethics approval and consent to participate
: Written informed consent was obtained from all patients prior to collecting samples. This study was approved by the Surgical Ethics Committee of Helsinki University Hospital (Dnro HUS 226/E6/06, extension TMK02 §66 17.4.2013).
: Not applicable.
: The authors declare that they have no competing interests.