| Total | Participants | |||
---|---|---|---|---|---|
Internal medicine specialist | Otorhinolaryngologist | Pediatrician | Primary care physician | ||
(G1) | (G2) | (G3) | (G4) | ||
No. of participants | 27 | 7 | 7 | 7 | 6 |
Average age (years) | Â | 49.3 | 42.6 | 46.9 | 46.5 |
Age range (years) |  | 44–51 | 39–50 | 41–56 | 44–48 |
Gender: male/female | 25/2 | 6/1 | 7/0 | 7/0 | 5/1 |
Location: Seoul/Kyungki-do | 21/6 | 7/0 | 6/1 | 4/3 | 4/2 |