1. University of Oxford, Oxford, United Kingdom;
2. Clinical Trial Service Unit (CTSU), Oxford, United Kingdom;
3. Karolinska Institutet, Karolinska University Hospital and SweBCG, Stockholm, Sweden;
4. Sunnybrook Odette Cancer Centre, Toronto, ON, Canada;
5. Royal Marsden Hospital and Institute of Cancer Research, London, United Kingdom;
6. University of Michigan Comprehensive Cancer Center, Ann Arbor, MI;