1) University Clinical Hospital in Szczecin Unii Lubelskiej 1, 71-252 Szczecin, Poland

2) T. Marciniak Lower Silesian Specialist Hospital Fieldorfa 2 Street, 54-049 Wroclaw, Poland

1) University Clinical Hospital in Szczecin Unii Lubelskiej 1, 71-252 Szczecin, Poland

2) T. Marciniak Lower Silesian Specialist Hospital Fieldorfa 2 Street, 54-049 Wroclaw, Poland

1) University Clinical Hospital in Szczecin Unii Lubelskiej 1, 71-252 Szczecin, Poland

3) Śniadeckiego Voivodeship Hospital in Białystok Białystok, Poland

4) University Clinical Hospital in Poznań 49 Przybyszewskiego Street, 60-355 Poznań Poland

5) Poznań University of Medical Sciences 11 Aleksandra Fredry Street, 61-701 Poznań Poland

6) Health Care Complex in Ostrów Wielkopolski Limanowskiego 20-22, 63-400 Ostrów Wielkopolski, Poland

7) Independent Provincial Combined Hospital in Szczecin 4 Arkońska Street, 71-455 Szczecin, Poland