1. Department of Pathology; Leiden University Medical Center; PO Box 9600 2300 RC Leiden The Netherlands
2. Centre for Mass Spectrometry Imaging, Biomolecular Sciences Research Centre; Sheffield Hallam University; Howard Street Sheffield S1 1WB UK
3. Center for Proteomics and Metabolomics; Leiden University Medical Center; PO Box 9600 2300 RC Leiden The Netherlands