| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the presence of [noun pl] in | 41 |
|
| 2 | the presence of [noun pl] of | 31 |
|
| 3 | the presence of [noun pl] at | 13 |
|
| 4 | the presence of [noun pl] on | 9 |
|
| 5 | the presence of [noun pl] with | 6 |
|
| 6 | the presence of antibodies [prep] | 5 |
|
| 7 | the presence of levels [prep] | 5 |
|
