Stevenson, Diane J., Avery, Anthony J., Coupland, Carol, Hobbs, F. D. Richard, Kendrick, Denise, Moore, Michael V., Morris, Clive, Rubin, Greg P., Smith, Murray D., Hawkey, Christopher J., Dumbleton, Jennifer S., "Recruitment to a large scale randomised controlled clinical trial in primary care: the Helicobacter Eradication Aspirin Trial (HEAT)", Trials, 2022