“Carbon and Nitrogen Isotopic Signatures as Metabolic Biomarkers of Nodal Metastasis and Recurrence in Oral Squamous Cell Carcinoma” Katarzyna Bogusiak, Zuzanna Popińska, Marcin Kozakiewicz, Piotr Paneth, Józef Kobos Cancers 18, 1461 (2026). Preprint 24 marca 2026 https://doi.org/10.20944/preprints202603.1862.v1