One of the most remarkable achievements of the TKI era has been the capacity to induce deep molecular remissions that are sustainable off therapy in chronic myeloid leukemia (CML) patients - treatment-free remission (TFR). TFR was first described in a handful of patients within 3-4 years of imatinib approval. In 2004 TFR was tested in a small French pilot study, followed soon after by the French STIM and Australasian TWISTER studies. These early trials demonstrated that TFR was achievable, …