1 Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool L7 8TX, UK. Electronic address: J.K.Field@liv.ac.uk.
2 University of Groningen, University Medical Center Groningen, Center for Medical Imaging, Groningen, Netherlands.
3 Department of Radiology, Royal Brompton Hospital, London, UK.
4 Department of Diagnostic and Interventional Radiology with Nuclear Medicine, Thoraxklinik, Heidelberg University, Germany Translational Lung Research Centre Heidelberg, Member of the German Centre for Lung Research, Heidelberg, Germany; Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Germany.
5 Respiratory Medicine Unit, David Evans Research Centre, Nottingham University Hospitals, Nottingham, UK.
6 Wolfson Institute of Preventive Medicine, Barts and The London School of Medicine and Dentistry and Queen Mary University of London, London, UK.