1. Department of Anesthesiology, Intensive Therapy and Pain Treatment , Poznań University of Medical Sciences , Poland
2. Department of Teaching Anesthesiology and Intensive Therapy , Poznań University of Medical Sciences , Poland
3. Central Microbiology Laboratory , Clinical Hospital at the Poznań University of Medical Sciences , Poznań , Poland
4. Center for Advanced Technology , Adam Mickiewicz University , Poznan , Poland
5. Department of Pediatric Anesthesiology and Intensive Therapy , Poznań University of Medical Sciences , Poland