Observation as a treatment strategy for advanced renal cell carcinoma—a call for prospective validation

1 Clinical Research Fellow, Department of Medical Oncology, The Royal Marsden Hospital, London, UK 2 Specialist Registrar, Department of Medical Oncology, The Royal Marsden Hospital, London, UK 3 Clinical Research Fellow, Department of Medical Oncology, Guy’s and St. Thomas’ Hospital, London, UK 4 Consultant Medical Oncologist, Department of Medical Oncology, Guy’s and St. Thomas’ Hospital, London, UK 5 Consultant Medical Oncologist, Department of Medical Oncology, The Royal Marsden Hospital, London, UK 6 Statistician, The Royal Marsden Hospital, London, UK 7 Professor of Medical Oncology, Department of Medical Oncology, The Royal Marsden Hospital, London, UK *Correspondence: [email protected]