FLASH Mechanisms Track (Oral Presentations) A MULTISCALE EXTENSION OF THE GENERALIZED STOCHASTIC MICRODOSIMETRIC MODEL (GSM2) TO DESCRIBE DYNAMICAL OXYGENATION AND FAST REACTION KINETICS FOR UNRAVELING THE FLASH EFFECT. (February 2022) - Cordoni, F.G.; Attili, A.; Tommasino, F.; Boscolo, D.; Fuss, M.; La Tessa, C.; Scifoni, E.