1 National Institute for Health Research Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College London, Hammersmith Campus, Du Cane Road, London, W12 0NN, United Kingdom. Electronic address: [email protected].
2 National Institute for Health Research Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, Imperial College London, Hammersmith Campus, Du Cane Road, London, W12 0NN, United Kingdom; Imperial College Healthcare NHS Trust, Hammersmith Hospital, Du Cane Road, London, W12 0HS, United Kingdom.
3 Imperial College Healthcare NHS Trust, St Mary's Hospital, London, W2 1NY, United Kingdom.
4 Imperial College Healthcare NHS Trust, St Mary's Hospital, London, W2 1NY, United Kingdom; Imperial College School of Medicine, South Kensington Campus, London, SW7 2AZ, United Kingdom.