General information of experts (n=16)
| Items | Options | n | % |
| Age (years) | 36–45 | 5 | 31.3 |
| ≥46 | 11 | 68.7 | |
| Years of work (years) | 15–20 | 4 | 25.0 |
| ≥21 | 12 | 75.0 | |
| Academic qualifications | Bachelor’s degree | 8 | 50.0 |
| Master’s degree | 6 | 37.5 | |
| Doctor | 2 | 12.5 | |
| Title | Associate senior | 6 | 37.5 |
| Senior | 10 | 62.5 | |
| Graduate student mentors | Master’s degree advisor | 14 | 87.5 |
| PhD supervisor | 2 | 12.5 |