| Age (in years) | Large tissue bites | Small tissue bites |
| 19 - 29 | 29 | 26 |
| 30 - 39 | 6 | 11 |
| 40 - 49 | 7 | 4 |
| 50 - 59 | 7 | 8 |
| >60 | 1 | 1 |
| Total | 50 | 50 |