Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
the fitbit service is not intended to diagnose , treat , cure , or prevent any disease . 

```
. OPTIONS: ['Jurisdiction' 'None' 'Limitation of liability' 'Content removal'
 'Choice of law' 'Contract by using' 'Unilateral termination'
 'Arbitration' 'Unilateral change'].