1. Department of Infectious Diseases, North Bristol NHS Trust, Southmead Hospital, Southmead Road, Bristol BS10 5NB, UK
2. Department of Microbiology, Bristol Royal Infirmary, Marlborough Street, Bristol BS1 3NU, UK
3. Department of Pharmacy, Bristol Royal Infirmary, Marlborough Street, Bristol BS1 3NU, UK
4. Sirona Care and Health CIC, Second Floor, Kingswood Civic Centre, High Street, Kingswood, Bristol BS15 9TR, UK