1. Laboratory of Experimental Clinical Chemistry Academic Medical Centre (AMC) of the University of Amsterdam Amsterdam the Netherlands
2. Vesicle Observation Centre AMC Amsterdam the Netherlands
3. Department of Biomedical Engineering and Physics AMC Amsterdam the Netherlands
4. Department of Clinical Chemistry and Haematology University Medical Center Utrecht Utrecht the Netherlands
5. Department of Medical Biology Electron Microscopy Centre Amsterdam AMC Amsterdam the Netherlands
6. Skin Cancer Unit German Cancer Research Center Heidelberg Germany
7. Department of Dermatology, Venereology and Allergology University Medical Center Mannheim Ruprecht‐Karl University of Heidelberg Heidelberg Germany