1. SpeechLab, Thessaloniki, Greece
2. 1st Otolaryngology Department, School of Medicine, Aristotle University of Thessaloniki, University Hospital AXEPA, Thessaloniki, Greece
3. 1st Department of Pediatrics, School of Medicine, Aristotle University of Thessaloniki, General Hospital “Ippokrateio”, Thessaloniki, Greece
4. Speech and Language Therapy Department, School of Health Rehabilitation Sciences, University of Patras, Patras, Greece
5. Centre for Gastrointestinal Sciences, The University of Manchester, Manchester, UK
6. 4th Department of Pediatrics, School of Medicine, Aristotle University of Thessaloniki, General “Papageorgiou” Hospital, Thessaloniki, Greece.