Beilmann-Lehtonen, Ines http://orcid.org/0000-0001-9183-3128
Böckelman, Camilla
Mustonen, Harri
Koskensalo, Selja
Hagström, Jaana
Haglund, Caj
Funding for this research was provided by:
University of Helsinki including Helsinki University Central Hospital
Article History
Received: 2 October 2019
Revised: 17 April 2020
Accepted: 28 April 2020
First Online: 19 May 2020
Compliance with ethical standards
: The Surgical Ethics Committee of Helsinki University Hospital (Dnro HUS 226/E6/06, extension TMK02 §66 17.4.2013) approved the study protocol. The National Supervisory Authority of Health and Welfare granted permission to use tissue archive samples retrospectively without requiring individual informed consent (Valvira Dnro 10041/06.01.03.01/2012).
: The authors declare that they have no competing interests.