Sample collection locations and number of isolates collected from examined wards (ICU, intensive care unit; BU, burn unit; SU, surgical unit; OU, other units; n, number of isolates; H1, Multispeciality Voivodeship Hospital in Gorzów Wielkopolski; H2, Regional Specialist Hospital in Gryfice; H3, Independent Public Clinical Hospital no. 1, Pomeranian Medical University in Szczecin; H4, Independent Public Clinical Hospital no. 2, Pomeranian Medical University in Szczecin; H5, Specialised Zdroje Hospital in Szczecin; H6, Sokolowski Specialist Hospital in Szczecin; H7, Hospital of the Ministry of the Interior and Administration in Szczecin; H8, West Pomeranian Oncology Centre in Szczecin; H9, West Pomeranian Hospice for Children in Szczecin; H10, Independent Public Clinical Hospital no. 1, Pomeranian Medical University in Police; H11, Residential Health Care Centre in Resko)