1. Biomedical Photonics Group, Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 412 96 Gothenburg, Sweden
2. Department of Physics, University of Gothenburg, Kemivägen 10, 412 96 Gothenburg, Sweden
3. Pharmaceutical Technology, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemigården 4, 412 96 Gothenburg, Sweden
4. Department of Applied Physics, Chalmers University of Technology, Kemivägen 9, 412 96 Gothenburg, Sweden