1. Hedenstierna Laboratory; Department of Surgical Sciences; Section of Anaesthesiology & Critical Care; Uppsala University; Uppsala Sweden
2. Departamento de Medicina Intensiva; Pontificia Universidad Cat ó lica de Chile; Santiago Chile
3. Cardio-Pulmonary Department; Pulmonary Divison; Heart Institute (Incor); University of São Paulo; São Paulo Brazil
4. Department of Medical Biochemistry and Microbiology; Uppsala University; Uppsala Sweden
5. Department of Pathology and Wildlife Diseases; National Veterinary Institute; Uppsala Sweden
6. Department of Medical Science, Clinical Physiology; Uppsala University Hospital; Uppsala Sweden