1. Scottish Haemophilus, Legionella, Meningococcus and Pneumococcus Reference Laboratory, Stobhill Hospital, Glasgow G21 3UW, UK
2. Scottish Shigella Salmonella and Clostridium difficile Reference Laboratory, Stobhill Hospital, Glasgow G21 3UW, UK
3. NHS Lanarkshire, Kirklands, Fallside Road, Bothwell, Glasgow G71 8BB, UK
4. NHS Greater Glasgow and Clyde, Public Health Protection Unit, West House, Gartnavel Royal Hospital, Glasgow, UK