1. Department of Obstetrics and Gynaecology; University Hospital Frankfurt, Goethe University; Frankfurt Germany
2. Department of Pediatrics, Divison of Immunology; University Hospital Frankfurt, Goethe University; Frankfurt Germany
3. Center for Infectious Diseases; Frankfurt Germany
4. Department of Biostatistics and Mathematic Modeling; Goethe University; Frankfurt Germany
5. Department of Pediatrics, Divison of Neonatology; University Hospital Frankfurt, Goethe University; Frankfurt Germany
6. Department of Infectious Diseases; University Hospital Frankfurt, Goethe University; Frankfurt Germany