| Criteria | Number of participants |
| Medical specialty | |
| Medicine | 10 |
| Surgery | 11 |
| Anesthesia | 11 |
| Range of clinical experience (years) | |
| 0 - 4 | 12 |
| 5 - 10 | 8 |
| >10 | 12 |
| Number of times procedure performed previously | |
| 0 - 4 | 10 |
| 5 - 10 | 5 |
| >10 | 17 |