Personalized ctDNA analysis for detection of residual disease and recurrence in surgically treated HNSCC patients. - Flach S; Pipinikas C; Huberty T; Lechner A; Murray C; Marsico G; Howarth K; Walz C; Käsmann L; Mock A; Jurmeister P; Unger K; et al. (NPJ precision oncology, 2026)