1. Department
of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen
10, SE-412 96 Gothenburg, Sweden
2. National Center
Imaging Mass Spectrometry, Kemivägen
10, SE-412 96 Gothenburg, Sweden
3. Department
of Chemical and Biological Engineering, Chalmers University of Technology, Kemivägen 10, SE-412 96 Gothenburg, Sweden