Professor Marion Campbell is Professor of Health Services Research at the University of Aberdeen. A medical statistician by training, Professor Campbell is a clinical trialist and trials methodologist. Her primary research focus is on the design, conduct and methodological advancement of surgical trials and of cluster randomised trials, publishing widely in these fields. She has served on many national and international advisory groups and funding committees. She is also an elected Fellow of the Faculty of Public Health and the International Society for Clinical Trials.