1. VU University Medical Center – Cancer Center Amsterdam, Department of Pathology 2.26, de Boelelaan 1117, NL-1081 HV Amsterdam, The Netherlands
2. Otolaryngology/Head & Neck Surgery, de Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands
3. Department of Oral & Maxillofacial Surgery/Oral Pathology, Academic Centre for Dentistry (ACTA), Amsterdam, The Netherlands
4. VU University Medical Center – Cancer Center Amsterdam, Department of Pathology 2.26, de Boelelaan 1117, NL-1081 HV Amsterdam, The Netherlands.