Long Term Follow-up Study for Patients Enrolled on the BP-004 Clinical Study

Follow-up of Phase 1/2 Study of CaspaCIDe T Cells (BPX-501) From an HLA-partially Matched Family Donor After Negative Selection of TCR αβ+T Cells in Pediatric Patients Affected by Hematological Disorders

This is a long-term follow up study evaluating the safety of BPX-501 T cells (rivogenlecleucel) and infused in pediatric patients previously enrolled on the BP-004 study.

Subjects enrolled on the BP-004 study who have completed or discontinued from the study, and are beyond Day 180 will be requested to enroll on this long-term follow up protocol. Long term follow up for gene therapy clinical and safety endpoints will continue up to 15 years.

Inclusion Criteria:

• Signed written informed consent by the patient or the patient's guardian for children who are minors
• Enrolled on BP-004 protocol, received BPX-501 infusion, completed or discontinued from the study, and are beyond Day +180.

Exclusion Criteria:

• Lack of parents'/guardian's informed consent for children who are minors
• Loss of allograft prior to 6 months