Andrew Gaya is heavily involved with the UK implementation of the latest radiotherapy techniques (e.g. IMRT, IGRT, Tomotherapy, combining targeted or anti-vascular drugs with radiotherapy and stereotactic body radiosurgery). He has specialist expertise in gastrointestinal, prostate, cyberknife robotic radiosurgery, complex radiotherapy planning. He is an oncologist at London Oncology Centre and is the lead clinical oncologist for audit and clinical governance at Guy’s Hospital. Anand Mahadaven is an Instructor in Radiation Oncology at Harvard Medical School and Attending Physician in Radiation Therapy at the Beth Israel Deaconess Medical Center.