1. German Cancer Research Centre (DKFZ), Unit F100, 69120 Heidelberg, Germany
2. Inserm unit U1074, DKFZ, 69120 Heidelberg, Germany
3. Institute for Diabetes and Obesitas, Monoclonal Antibody Core Facility, German Research Center for Environmental Health, Helmholtz Zentrum München, 81377 Munich, Germany
4. German Cancer Research Centre (DKFZ), Unit C060, 69120 Heidelberg, Germany
5. Differentiation and Cancer Group, IPATIMUP, Rua Dr Roberto Frias s/n, 4200 - 465 Porto, Portugal