1226P Predictive value of circulating tumor DNA (ctDNA) before and shortly after curative treatment in early stage non-small cell lung cancer (NSCLC), and exploration of (pre-)analytical factors. - van den Heuvel, M.; Smith, C.G.; Schuurbiers, M.; Hartemink, K.; Rintoul, R.; Monkhorst, K.; Van Den Broek, D.; Rosenfeld, N. (Annals of Oncology, 2024)