Funding for this research was provided by:
Received: 7 July 2021
Accepted: 23 February 2022
First Online: 9 March 2022
: The study was approved by the Regional Ethics Review board, Dept of Medical Research, Umeå, Sweden, 2018/227–31. The surgical procedure that all subjects have undergone constituted the routine surgical treatment option at the clinic, before which conventional informed oral consent was obtained. For this retrospective study, including data collection and analysis, no further consent was needed. This was approved by the ethics review board. The study was conducted in accordance with the World Medical Association Declaration of Helsinki entitled ‘‘Ethical Principles for Medical Research Involving Human Subjects”.
: The manuscript does not contain any individual person´s data.
: The authors declare that they have no relevant financial or non-financial interests to disclose.