1. University of Gothenburg, Department of Chemistry and Molecular Biology, Gothenburg 41296, Sweden
2. Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, Mölndal Hospital, House V3, 43180 Mölndal, Sweden
3. The Gothenburg Imaging Mass Spectrometry (Go:IMS) Laboratory, University of Gothenburg and Chalmers University of Technology, Gothenburg 41296, Sweden
4. University of Göttingen Medical Center, Institute of Neuro- and Sensory Physiology, Göttingen 37073, Germany