First-line treatment of unresectable or metastatic HER2 positive esophagogastric adenocarcinoma: liquid biomarker analysis of the phase 2 INTEGA trial ====================================================================================================================================================== * Lisa Paschold * Alexander Stein * Benjamin Thiele * Joseph Tintelnot * Svenja-Sibylla Henkes * Cornelia Coith * Christoph Schultheiß * Klaus Pantel * Sabine Riethdorf * Mascha Binder