1. Department of Clinical Oncology, Li Ka Shing Faculty of MedicineThe University of Hong Kong Hong Kong
2. Clinical Oncology CenterThe University of Hong Kong‐Shenzhen Hospital Shenzhen China
3. Department of Radiation Oncology, Princess Margaret Cancer CentreUniversity of Toronto Toronto Ontario Canada
4. Department of Diagnostic Radiology, Li Ka Shing Faculty of MedicineThe University of Hong Kong Hong Kong