1. Department of Otorhinolaryngology, Erasmus University Medical Center, 3015 Rotterdam, The Netherlands
2. Department of Ophthalmology, Erasmus University Medical Center, 3015 Rotterdam, The Netherlands
3. Department of Ear, Nose and Throat Diseases-Ophthalmology, University of Medicine of Tirana, 1000 Tirana, Albania
4. CLINTEC, Karolinska Institutet, 171 77 Stockholm, Sweden
5. Department of Public Health, University of Medicine of Tirana, 1000 Tirana, Albania
6. Independent Consultant in Early Hearing Detection, Intervention and Family Centered Practice, Ribble Valley BB7 2RA, UK