1. Institute of Medical Microbiology and Hygiene, University Hospital Ulm
2. Fachgebiet (FG)11 National Reference Centre for Salmonella and Other Bacterial Enterics
3. FG13 Nosocomial Pathogens and Antibiotic Resistance, Robert Koch Institute, Wernigerode
4. Department of Paediatrics and Adolescent Medicine, University Hospital Ulm, Germany