1. Biomedical Center, Protein Analysis Unit, Faculty of Medicine, Ludwig-Maximilians-Universität München, Großhaderner Strasse 9, 82152 Planegg-Martinsried, Germany
2. Institute of Stem Cell Research, Helmholtz Center Munich, German Research Center for Environmental Health, 85764 Munich, Germany
3. Biomedical Center, Computational Biology Unit, Faculty of Medicine, Ludwig-Maximilians-Universität München, Großhaderner Strasse 9, 82152 Planegg-Martinsried, Germany