1. These authors contributed equally to this manuscript
2. Postgraduate Training for Applied Epidemiology (PAE), Robert Koch-Institute, Berlin, Germany
3. Robert Koch-Institute, Department for Infectious Disease Epidemiology, Berlin, Germany
4. Robert Koch Institute, Division of Nosocomial Pathogens and Antibiotic Resistance, Wernigerode, Germany
5. National Reference Centre for multidrug-resistant Gram-negative bacteria, Ruhr University Bochum, Bochum, Germany
6. Department of Pediatrics, Pediatric Infectious Diseases, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany