P601: GENETIC DRIVERS IN THE NATURAL HISTORY OF CHRONIC LYMPHOCYTIC LEUKEMIA DEVELOPMENT AS EARLY AS 16 YEARS BEFORE DIAGNOSIS - Pieter Martijn Kolijn; Florentin Späth; Mouhamad Khouja; Paul Hengeveld; Lina van der Straten; Nikos Darzentas; Magnus Hultdin; James D. Mckay; Christiane Pott; Roel C.H. Vermeulen; Anton Langerak (HemaSphere, 2023)