Ignac Fogelman BSc, MD, FRCP is Professor of Nuclear Medicine in the Division of Imaging Sciences and Biomedical Engineering of Kings College London and honorary consultant at Guys and St Thomas' NHS Foundation Trust, London, UK

Susan E. M. Clarke, MB, BS, MSc, FRCP, FRCR, FBIR is an Honorary Consultant in the Department of Nuclear Medicine at Guys and St Thomas' NHS Foundation Trust, London, UK and Senior Lecturer in the Division of Imaging Sciences and Biomedical Engineering of Kings College, London, UK

Gopinath Gnanasegaran, BS, MSc, MD, FRCP is a Consultant Physician in the Department of Nuclear Medicine at Guys and St Thomas' NHS Foundation Trust

Gary J. R. Cook, BS, MSc, MD, FRCR, FRCP is Professor of Clinical PET Imaging in the Division of Imaging Sciences and Biomedical Engineering of Kings College London, UK