1. Affiliations of authors: Tumor Biology Centre, University Clinic Centre, Freiburg, Germany (JW); Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland (KAT); Department of Otolaryngology Head and Neck Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden (EH); Oncology Departments, Complejo Hospitalario de Navarra, Pamplona, Spain (JIA); Department of Medical Oncology, Lorraine Cancer Insti