Funding for this research was provided by:
Horizon 2020 Framework Programme (874627, 874739)
Cancer Research UK (22184)
Medical Research Council (MR/L01341X/1, MR/S019669/1)
British Heart Foundation (RE/18/4/34215)
Received: 17 September 2020
Accepted: 21 January 2021
First Online: 15 February 2021
Compliance with ethical standards
: The authors do not have any conflict of interest to disclose.
: Ethical approval for the nurse visit was obtained from the National Research Ethics Service (Reference: 10/H0604/2). Participants gave written consent for blood sampling (McFall et al. 2014).