Funding for this research was provided by:
Received: 1 October 2021
Accepted: 17 December 2021
First Online: 10 January 2022
: The regional ethical review board in Umeå approved the study (Dnr 2018-444-31M). In accordance with Swedish legislation and regulations regarding patient consent for participation in a national quality registry, patients are informed about their inclusion in the registry before undergoing surgery. They can opt out of inclusion at any time.
: Not applicable.
: Mats Tullberg has received an honorarium for lecturing from Codman, Integra. The other authors declare that they have no competing interests.