807 A vaccine targeting the recurrent driver mutation H3K27M induces mutation specific T- and B- cell responses in patients with diffuse midline Gliomas - Isabel Poschke; Michael Platten; Edward Green; Katharina Lindner; Tamara Boschert; Taga Lerner; Kristina Kromer; Iris Mildenberger; Gordon Haltenhof; Katharina Sahm; John Lindner (Journal for ImmunoTherapy of Cancer, 2023)