| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | caused by [noun pl] | 264 |
|
| 2 | caused by changes | 16 |
|
| 3 | caused by differences | 11 |
|
| 4 | caused by bacteria | 7 |
|
| 5 | caused by factors | 5 |
|
