| Respondents n | |
| Country | |
| Australia | 2 |
| Belgium | 2 |
| Canada | 1 |
| China | 1 |
| Denmark | 1 |
| Greece | 2 |
| Ireland | 1 |
| Italy | 1 |
| Lithuania | 6 |
| Spain | 1 |
| Sweden | 3 |
| The Netherlands | 7 |
| UK | 9 |
| USA | 7 |
| Primary speciality | |
| Ear, nose and throat | 6 |
| Gastroenterology | 2 |
| General practice | 4 |
| Paediatrics | 5 |
| Respiratory medicine | 27 |