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Summary of the number of primary surgeries and second surgeries for glioblastoma according to questionnaire respondents
| Number of GBM surgeries per year | Number of units* | Number of surgeries for GBM progression per year (n) | ||
|---|---|---|---|---|
| < 5 | 5–10 | > 10 | ||
| > 100 | 48 | 0 | 7 | 41 |
| 51–100 | 84 | 7 | 26 | 51 |
| 21–50 | 70 | 27 | 27 | 16 |
| 1–20 | 26 | 21 | 3 | 2 |
*Data point not answered by 6 responders
