1 Department of Haemato-oncology, Barts Health NHS Trust, St. Bartholomew's Hospital, West Smithfield, London EC1A 7BE, United Kingdom.
2 Division of Infection, Barts Health NHS Trust, St. Bartholomew's Hospital, West Smithfield, London EC1A 7BE, United Kingdom.
3 Department of Haemato-oncology, Barts Health NHS Trust, St. Bartholomew's Hospital, West Smithfield, London EC1A 7BE, United Kingdom; Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, United Kingdom.
4 Department of Haemato-oncology, Barts Health NHS Trust, St. Bartholomew's Hospital, West Smithfield, London EC1A 7BE, United Kingdom; Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, United Kingdom. Electronic address: j.riches@qmul.ac.uk.