1. Section of Clinical Biochemistry , University Hospital of Verona , P.le LA Scuro 10, 37134 Verona , Italy , European Federation for Clinical Chemistry and Laboratory Medicine (EFLM) Working Group for Preanalytical Phase (WG-PRE)
2. European Federation for Clinical Chemistry and Laboratory Medicine (EFLM) Working Group for Preanalytical Phase (WG-PRE) ; and Department of Medical Laboratory Diagnostics , University Hospital Sveti Duh , Zagreb , Croatia