**Author details**

Dragica Smrke1 , Primož Rožman<sup>2</sup> , Matjaž Veselko<sup>1</sup> and Borut Gubina1\*

\*Address all correspondence to: gubina@gmail.com

1 Department of Surgery, University Medical Center Ljubljana, Ljubljana, Slovenia

2 Blood Transfusion Centre of Slovenia, Ljubljana, Slovenia
