1. Institute of Sensors, Signals and Electrotechnics (SENSE), Technical Faculty, University of Southern Denmark, Odense, Denmark, Institute of Photonic Technology, Jena, Germany, Department of Cancer and Inflammation, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark, Department of Oncology, Odense University Hospital, Odense, Denmark, and Institute of Physical Chemistry, University Jena, Jena, Germany