"Any other comments?" Open questions on questionnaires – a bane or a bonus to research?Alicia O’Cathain, Kate Thomas|BMC Medical Research Methodology|2004Cited by 646
Maximising the impact of qualitative research in feasibility studies for randomised controlled trials: guidance for researchersAlicia O’Cathain, Jenny Donovan, Joy Adamson et al.|Pilot and Feasibility Studies|2015Cited by 482
What can qualitative research do for randomised controlled trials? A systematic mapping reviewAlicia O’Cathain, Jenny Hewison, Sarah J Drabble et al.|BMJ Open|2013Cited by 463
What can qualitative research do for randomised controlled trials? A systematic mapping reviewAlicia O’Cathain, Jenny Hewison, Kate Thomas et al.|Trials|2013Cited by 198