Received: 20 November 2021
Accepted: 12 April 2022
First Online: 29 April 2022
: Informed consent from participants was waived as all data were collected as part of Guy’s Cancer Cohort, a Health Research Authority approved database established at Guy’s and St Thomas’ NHS Hospitals (Ethics Reference Number: 18/NW/0297) [CitationRef removed]. The study was performed in accordance with the Declaration of Helsinki. The research protocol for data collection and analysis was approved by Guy’s and St Thomas NHS Hospitals as part of Guy’s Cancer Cohort (Ethics Reference number: 18/NW/0297) [CitationRef removed]. The research database, Guy’s Cancer Cohort, received a favourable opinion on the 15th May 2018 from the North West-Haydock Research Ethics Committee.
: Not applicable.
: The authors declare that they have no competing interests.