Najib M. Rahman Najib M. Rahman is Associate Professor of Respiratory Medicine. He runs the Oxford Pleural Unit (Oxford, UK) and is Director of the Oxford Respiratory Trials Unit (Oxford). Having qualified in medicine from the University of Oxford (Oxford), he conducted his post graduate training in Nottingham (UK), then his specialist training in Oxford, including a DPhil in pleural disease (conducting the MIST2 study) and an MSc in clinical trials methodology. He now conducts research in clinical and translational pleural disease in Oxford, and runs randomised and observational studies in pleural infection, pneumothorax, malignant pleural effusion and ultrasound. He has authored over 90 peer reviewed publications. Giovanni Volpicelli Giovanni Volpicelli has been an emergency physician at the Emergency Department of San Luigi Gonzaga University Hospital (Torino, Italy) since 1998. In 2016, he qualified as Associate Professor of Internal Medicine. Giovanni Volpicelli was Chair of the Scientific Committee of the 1st International Consensus Conference on Lung Ultrasound. He is a member of the Scientific Committee of the 2nd International Consensus Conference on Ultrasound in Trauma, and he is a board member of the 1st International Consensus Conference on US in Medical Education. He is Editor-in-Chief of the Critical Ultrasound Journal, Academic Editor of Medicine and a member of the Editorial Boards of and reviewer for many international journals, including The New England Journal of Medicine, Annals of Internal Medicine, the American Journal of Respiratory and Critical Care Medicine, Chest, Intensive Care Medicine, Critical Care Medicine, Critical Care, Anesthesiology, and the American Journal of Emergency Medicine. He is a scientific reviewer for MORE (McMaster Online Rating of Evidence) at McMaster University (Health Information Research Unit, Hamilton, ON, Canada). Giovanni Volpicelli is a fellow of the American College of Chest Physicians (ACCP), a member of the American College of Emergency Physicians (ACEP) and a member of the Board of Directors of the World Interactive Network Focused on Critical Ultrasound (WINFOCUS). He coordinates the international program of education on lung ultrasound for WINFOCUS. Giovanni Volpicelli has authored and co-authored chapters of international books in emergency medicine and emergency ultrasound, and has 93 indexed publications in peer-reviewed international journals with 3450 citations. xii https://doi.org/10.1183/2312508X.10001018