affiliation not provided to SSRN, University College London, University College London, University College London - UCL Centre for Medical Imaging, University College London, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Guy's and St Thomas' NHS Foundation Trust - Department of Thoracic Surgery, affiliation not provided to SSRN, University College London, affiliation not provided to SSRN and University College London