A Study of Treatment-free Remission in Chronic Phase Chronic Myeloid Leukemia

that patients who lost MR3.0 after stopping TKIs, thus failed to maintain treatment-free remission can achieve second sustainable MR4.5 by sustainable MR4.5 for more than 3 years once regained and prolong MRFS by adding asciminib to TKIs. Patients will be restarted on TKIs when they fail sustaining MR3.0 after cessation because restarting TKIs when loss of MR3.0 is reasonable in this situation