Clinical Trial Service Unit, NDPH, University of Oxford, Oxford, United Kingdom
Royal Blackburn Hospital, Blackburn, Lancashire, United Kingdom
Queen Elizabeth Hospital, Birmingham, West Midlands, United Kingdom
Royal Berkshire Hospital, Reading, Berkshire, United Kingdom
Clinical Trial Service Unit & Epidemiological Studies Unit, University of Oxford, Oxford, United Kingdom
CTSU, Richard Doll Building, University of Oxford, Oxford, Oxon, United Kingdom
University of Oxford, Oxford, Oxfordshire, United Kingdom
Atlas Trial Office, Oxford, England, United Kingdom