Received: 31 March 2021
Accepted: 29 August 2021
First Online: 8 September 2021
: Written informed consent was obtained from all the participants in the original studies. Norwegian Regional Ethics committees (REC) approved that each constituent study could contribute to the consortium, and the current study was approved by the REC South East (2017/2533). All methods were performed in accordance with the relevant guidelines and regulations. Privacy and confidentiality were maintained throughout the study.
: Not applicable.
: The authors declare that they have no competing interests.