1 School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK; GAMA Healthcare, Watford, UK.
2 Department of Microbiology, Hairmyres Hospital, NHS Lanarkshire, East Kilbride, UK; School of Applied Sciences, Edinburgh Napier University, Edinburgh, UK.
3 Guy's and St Thomas' NHS Foundation Trust, London, UK.
4 School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, UK. Electronic address: maillardj@cardiff.ac.uk.