Publication Type: Journal Article Authors: O'Sullivan, J. W.; Stevens, S.; Oke, J.; Hobbs, F. D. R.; Salisbury, C.; Little, P.; Goldacre, B.; Bankhead, C.; Aronson, J. K.; Heneghan, C.; Perera, R. Source: BMC Med, Volume 16, Number 1, p.229 (2018)