Dr Jonathan Krell qualified in medicine at Leeds University Medical School, where he also gained a first-class honours degree in pharmacology. After completion of junior doctor posts at St. James\' Hospital in Leeds and Guy\'s and St. Thomas\' hospitals in London, he undertook his training in oncology at Charing Cross and Hammersmith hospitals in London. His clinical focus is on the systemic management of patients with breast and gynaecological malignancies. Dr Krell has published over 100 peer-reviewed papers in journals such as the Lancet Oncology, Genome Research, the Journal of Clinical Oncology, Blood and Breast Cancer Research, and regularly presents new data from his research at major national and international conferences. Dr Krell’s clinical focus is on the systemic management of patients with Gynaecological Cancer and Breast Cancers. Dr Krell also has a specialist clinical interest in cancer genetics and hereditary malignancies, particularly those involving the Breast Cancer (BRCA) gene and other genetic mutations.