P1402: ALTERATIONS OF HUMAN BONE MARROW NICHE IN CLONAL HEMATOPOIESIS AND AML. (23rd June 2022) - Dragieva, Y.; Rothenberg-Thurley, M.; Ksienzyk, B.; Hadzic, A.; Paulus, A.; Tast, B.; Subklewe, M.; Spiekermann, K.; Theurich, S.; Metzeler, K.; Solovey, M.; Ziemann, F.