1 Department of Radiation Oncology, Odette Cancer Centre, The University of Toronto, Toronto, Ontario, Canada.
2 Faculty of Science, Agriculture and Engineering, Newcastle University, Newcastle-upon-Tyne, UK.
3 Department of Clinical Oncology, Queen Elizabeth Hospital, Kowloon Central Cluster, Hospital Authority, Hong Kong S.A.R, China; Department of Oncology, United Christian Hospital, Kowloon East Cluster, Hospital Authority, Hong Kong S.A.R., China.
4 Department of Radiation Oncology, Mayo Clinic, Rochester, MN.
5 Department of Radiation Oncology, University of Minnesota, Minneapolis, MN.
6 Department of Clinical Oncology, The Christie NHS Foundation Trust, Manchester, UK; Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK.
7 Department of Oncology, Princess Margaret Hospital, Kowloon West Cluster, Hospital Authority, Hong Kong S.A.R., China. Electronic address: [email protected].