| NCT Number | NCT04675294 |
| Lead Sponsor | ALX Oncology Inc.
Collaborators: Merck Sharp & Dohme LLC |
| Conditions | Head and Neck Cancer, Head and Neck Squamous Cell Carcinoma |
| Enrollment | 189 participants |
| Start Date | 2021-04-02 |
| Primary Completion | 2025-03-03 (estimated) |
| Study Completion | 2026-06-30 (estimated) |
| Updated on ClinicalTrials.gov | 2025-08-01 |