1. Department of Chemistry and Chemical Engineering, Centre for Imaging Mass Spectrometry; Chalmers University of Technology; 412 96 Gothenburg Sweden
2. Biomedical Photonics Group, Department of Molecular Biology and Chemistry; University of Gothenburg; 412 96 Gothenburg Sweden
3. Occupational Dermatology, Department of Clinical Sciences; Sahlgrenska Academy at the University of Gothenburg; 413 45 Gothenburg Sweden