1. Department of Anaesthesiology; Division of Intensive Care Medicine; Oulu University Hospital; Medical Research Center Oulu; University of Oulu; Oulu Finland
2. NordLab Oulu; Oulu University Hospital; Medical Research Center Oulu; Department of Clinical Chemistry; University of Oulu; Oulu Finland
3. Department of Infection Control; Oulu University Hospital; Medical Research Center Oulu; University of Oulu; Oulu Finland