1 | Institute of Nursing and Midwifery, Faculty of Health Sciences, Jagiellonian University Medical College, Krakow, Poland |
2 | Dr Jan Bobr Centre for Microbiology and Vaccines, Krakow, Poland |
3 | Clinical Department of Neonatology, University Hospital, Krakow, Poland |
4 | Department of Microbiology, Jagiellonian University Medical College, Krakow, Poland |