Funding for this research was provided by:
Wellcome Trust (201440/Z/16/Z)
Received: 8 March 2022
Accepted: 16 May 2022
First Online: 1 June 2022
: This study was approved by the London School of Hygiene and Tropical Medicine Ethics Committee (Ref: 17836). Ethical approval for the 2015 Health Survey for England was obtained from the West London Research Ethics Committee (Ref: 14/LO/0862) and informed consent obtained from each participant. All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare no conflicts of interest.