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Table 2 The withdrawal criteria for the study

From: Patient-reported outcome (PRO)-based symptom assessment in patients with advanced lung cancer receiving first-line combination immunotherapy: a protocol for a multicenter, prospective, observational study

Withdrawal criteria

1. Cancelling planned immunotherapy before the treatment.

2. Patients who break the study protocol (deliberately offering inaccurate PRO data).

3. Patients who demand an immediate withdraw from the research.

4. Severe complications interfering with PRO data collection.

5. Other conditions that require withdrawal as assessed by the investigator.