| Treatment | Factors | ||||
| C1 | C2 | T | S | N | |
| 1 | x |
| x | x |
|
| 2 | x |
| x |
| x |
| 3 |
| x | x | x |
|
| 4 |
| x | x |
| x |
| 5 |
| x |
| x |
|