Funding for this research was provided by:
Medical Research Council (MC_PC_17213)
NIHR Cambridge Biomedical Research Centre (BRC-1215-20014)
Received: 23 May 2022
Accepted: 18 January 2023
First Online: 24 January 2023
: The data are publicly available. The use of secondary de-identified data makes this study exempt from institutional review board review. Participants in the original studies gave informed consent and the original survey was approved by the Biomedical Research Ethics Committee of Peking University (IRB00001052-14010). All methods were carried out in accordance with the Declaration of Helsinki.
: Not applicable.
: No interest needs to be reported.