1. Department of Pharmaceutical and Cellbiological Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany
2. Department of Neuro-/Pathology, University of Oslo and Oslo University Hospital, Sognsvannsveien 20, 0372 Oslo, Norway
3. LIED, University of Lübeck, Ratzenburger Allee 160, 23538 Lübeck, Germany
4. Department of Pharmacology, Faculty of Medicine, University of Latvia, Jelgavas iela 1, 1004 Riga, Latvia
5. Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry, Weinberg 3, 06120 Halle, Germany
6. Cancer Drug Resistance and Stem Cell Program, University of Sydney, Kolling Building, 10 Westbourne Street, Sydney, New South Wales 2065, Australia