1. LGC Limited; Queens Road Teddington TW11 0LY UK (director and chair of the Forensic Isotope Ratio Mass Spectrometry (FIRMS) Network)
2. National Measurement Institute; 105 Delhi Road, Riverside Corporate Park North Ryde New South Wales 2113 Australia (steering group member of the FIRMS Network)
3. Queensland Health Forensic and Scientific Services; P.O. Box 594 Archerfield Queensland 4109 Australia (director of the FIRMS Network)
4. Linked Forensic Consultants Ltd; Raumati Beach 5255 Wellington New Zealand (director of quality of the FIRMS Network)