| to other healthcare providers | 4 | transitive-object |
| in certain circumstances | 4 | temporal |
| from nurse | 3 | other |
| patient → need → referral | 5 |
| patient → necessitate → referral | 3 |
| patient → require → referral | 3 |
| patient → have → referral | 3 |
| negative | neutral | positive |
| 0.253 | 0.564 | 0.183 |
| Raw frequency | 14 |
| Normalized frequency | 0.308 |
| Modifier score | 0.700 |
| Perplexity | 62.936 |