1 Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute - Antoni van Leeuwenhoek, Plesmanlaan 121, Amsterdam, Noord-Holland, 1066 CX, The Netherlands; Amsterdam Center for Language and Communication, University of Amsterdam, Amsterdam, The Netherlands. Electronic address: m.neijman@nki.nl.
2 Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute - Antoni van Leeuwenhoek, Plesmanlaan 121, Amsterdam, Noord-Holland, 1066 CX, The Netherlands.
3 Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute - Antoni van Leeuwenhoek, Plesmanlaan 121, Amsterdam, Noord-Holland, 1066 CX, The Netherlands; Amsterdam Center for Language and Communication, University of Amsterdam, Amsterdam, The Netherlands; Department of Oral and Maxillofacial Surgery, Amsterdam University Medical Center (AUMC), Amsterdam, The Netherlands.