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Pre-survey results.
| Number of Trainees that previously participated in US-Guided PCNL | 13 | |
| Median (IQR) number of previous US-guided PCNL experiences | 10 (0–40) | |
| Roles Performed during Previous US-Guided PCNL | Observing | 13 |
| Manipulating Probe | 11 | |
| Needle Insertion | 9 | |
| Comfort Obtaining US-guided PCNL access | None of the Cases | 4 |
| Some Cases | 4 | |
| About half of the Cases | 3 | |
| Most Cases | 3 | |
IQR = interquartile range.
