Funding for this research was provided by:
St. George's University of London
Article History
Received: 20 October 2020
Accepted: 21 October 2020
First Online: 4 November 2020
Compliance with ethical standards
: The authors of this paper declare that they have no conflicts of interest. All procedures performed involving human participants were in accordance with the ethical standards of the University of Oxford Medical Sciences Inter-Divisional Research Ethics Committee and with the 1964 Helsinki declaration and its later amendments. Informed consent was obtained from all individual participants included in the study.