Funding for this research was provided by:
Academy of Medical Sciences (GCRFNG\100433)
Pathological Society of Great Britain and Ireland (2234)
Cancer Research UK (Optimisticc C10674/A27140)
Received: 9 August 2020
Accepted: 4 February 2021
First Online: 16 February 2021
Ethics approval and consent to participate
: Network members were granted local ethical approval for participant enrolment (Argentina: #3507; Chile: CEC201828; India: IEC/2018/01, Indian Council of Medical Research: 2018-0337; Vietnam: QD.0604), and ethical approval for the whole study was granted by the University of Leeds (MREC17-077). Participants gave informed voluntary consent to take part in the study. The research conformed to the principles of the Helsinki Declaration.
: Not applicable.
: The authors declare that they have no competing interests.