CAR-T Long Term Follow Up (LTFU) Study is a study designed to keep track of patients for 15 years after they receive a special type of treatment called CAR-T therapy. This treatment uses modified cells to fight cancer. Health experts want to make sure this treatment is safe and works well for a long time. The study monitors any delayed side effects or changes in health. It also checks if a virus used in the treatment, called a lentivirus, stays safe in the body. Patients can join this follow-up after finishing or stopping their main CAR-T therapy study. Safety and how well the treatment works will be observed over time.

• Patients are followed for 15 years after their last treatment.
• No specific reasons are needed to exclude patients from joining.
• Patients must agree to be part of this study and have had previous CAR-T therapy.