1. Speech Therapy Department, Alcoitão School of Health Sciences, Clinical and Therapeutics Pharmacological Unit, Faculty of Medicine, Instituto de Medicina Molecular, University of Lisbon, Lisbon, Portugal;
2. ENT department, Hospital of Santa Maria, Lisbon, Portugal;
3. ENT department, Institute of Oncology, Lisbon, Portugal;
4. ENT department, Hospital of Santo Antonio, Oporto, Portugal;
5. ENT department, Hospital Garcia de Orta, Almada, Portugal;
6. ENT department, Hospital of the Divino Espírito Santo, Ponta Delgada, Azores, Portugal;
7. ENT department, Coimbra University Hospital, Coimbra, Portugal;
8. ENT department, Hospital do Espírito Santo de Évora, EPE, Évora, Portugal