| Left cheek | ||
| Subject No | before | after |
| 1 | 2.5 | 1.5 |
| 2 | 3.5 | 2.5 |
| 3 | 3 | 2.5 |
| 4 | 3.5 | 4 |
| 5 | 3 | 2.5 |
| 6 | 3 | 2 |
| 7 | 3 | 3 |
| 8 | 3 | 2.5 |
| 9 | 3 | 2.5 |
| 11 | 3.5 | 3 |
| 12 | 2.5 | 4 |
| 13 | 3.5 | 3.5 |
| 14 | 5 | 4 |
| 15 | 1 | 1 |
| 16 | 2.5 | 2.5 |
| 17 | 4 | 2.5 |
| 18 | 3.5 | 3.5 |
| 19 | 4.5 | 4 |
| 20 | 1 | 1 |