1. Department of Nutrition and Public Health, Universidad del Bío-Bío, Chillán, Chile
2. Department of Public Health, Palacký University Olomouc, Olomouc, Czech Republic
3. Ñuble Health Service, Ministry of Health, Chillán, Chile
4. Austrian Agency for Health and Food Safety, Institute for Medical Microbiology and Hygiene, Vienna, Austria
5. foodmicrobe.com, Adams Hill, Keyworth, Nottinghamshire, United Kingdom