Funding for this research was provided by:
Commonwealth Scholarship Commission
Ernest Oppenheimer Memorial Trust
Human Brain Project (Specific Grant Agreement 3, 945539)
Medical Research Council (MR/R006423/1)
Engineering and Physical Sciences Research Council (EP/R018472/1, EP/T018445/1)
Wellcome Trust (203139/Z/16/Z)
Received: 15 October 2021
Accepted: 1 March 2022
First Online: 14 March 2022
: The study was approved by the Local Research Ethics Committee (Oxford Research Ethics Committee B, Oxford, UK) and data collection was performed between October and December 2009. The study was performed in line with the Declaration of Helsinki and all subjects gave written informed consent.
: The authors declare that they have no competing interests.