Funding for this research was provided by:
Ragnar Söderbergs stiftelse
Ollie & Elof Ericssons stiftelse Gösta Miltons donationsfond Stiftelsen Cancera
Received: 21 November 2019
Accepted: 12 March 2020
First Online: 24 March 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.