1. Department of Molecular Cell Biology and Immunology; VU University Medical Center; Amsterdam The Netherlands
2. Department of Surgery; VU University Medical Center; Amsterdam The Netherlands
3. Department of Experimental Immunohematology; Sanquin Research and Landsteiner Laboratory; Academic Medical Center; University of Amsterdam; Amsterdam The Netherlands
4. Tumor Biology Section; Department of Otolaryngology/Head-Neck Surgery; VU University Medical Center; Amsterdam The Netherlands