1. Department of Surgery; The Netherlands Cancer Institute-Antoni van Leeuwenhoek; Plesmanlaan 121 1066 CX Amsterdam The Netherlands
2. Philips Research, In-Body Systems Department; HTC 34 5656 AE Eindhoven The Netherlands
3. Philips HealthTech; Veenpluis 4 5684 PC, Best The Netherlands
4. Department of Anesthesiology and Pain Medicine; Maastricht University Medical Center; P. Debyelaan 25 6229 HX, Maastricht The Netherlands
5. Department of Anesthesiology; Radboud Medical Center; Radboud University; Geert Grooteplein Zuid 10 6525 GA, Nijmegen The Netherlands
6. Diakonie-Klinikum Schwäbisch Hall; Department of Anesthesia; Diakoniestraße 10 74523 Schwäbisch Hall Germany
7. Department of Biomedical Engineering and Physics; Amsterdam Medical Center; Meibergdreef 9 1105 AZ Amsterdam the Netherlands
8. Department of BioMechanical Engineering; Delft University of Technology; Mekelweg 2 2628 CD, Delft The Netherlands
9. Nanobiophysics Group, MIRA Institute; University of Twente; Post Box 217 7500 AE Enschede The Netherlands