1. 1Independent Consultant, Medical Epidemiologist, Geneva, Switzerland;
2. 2Microbiology Department, Kingston Hospital NHS Foundation Trust, Kingston upon Thames, London, United Kingdom;
3. 3Public Health Department, Local Health Unit N. 2 “Marca Trevigiana”, Treviso, Veneto, Italy;
4. 4Infectious Diseases Department, Sassari University Hospital, University of Sassari, Sassari, Italy;
5. 5Division of Water Resources Engineering, Lund University, Lund, Sweden