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Age at first surgical procedure and number of surgical procedures. The numbers in parentheses are the numbers of procedures performed prior to the index operation
| Patient number | Age at first surgical procedure (years) | Number of surgical procedures |
|---|---|---|
| 1 | 9 | 4 (0) |
| 2 | 17 | 4 (0) |
| 3 | 16 | 10 (3) |
| 4 | 1 | 6 (1) |
| 5 | 4 | >3 (>1) |
| 6 | 1 | 12 (9) |
| 7 | 9 | 10 (1) |
| 8 | 2 | 11 (5) |
| 9 | 4 | 12 (4) |
| 10 | 2 | 3 (2) |
| 11 | 1 | 7 (2) |
| 12 | 4 | 5 (0) |
