Long-term follow-up of subjects who received SB-318, SB-913, or SB-FIX in a previous trial and completed at least 52 weeks post-infusion follow-up in their primary protocol. Enrolled subjects will be followed for a total of up to 10 years following exposure to SB-318, SB-913, or SB-FIX.

Non-interventional, multi-center, long-term follow-up (LTFU) study of subjects dosed with SB-318 in the clinical study SB-318-1502, SB-913 in the clinical study SB-913-1602, and SB-FIX in clinical study SB-FIX-1501. All subjects dosed in the studies and completed at least 52 weeks post-infusion follow-up in their primary protocol will be offered to participate. Subjects who enroll will be monitored for a total of up to 10 years following exposure to the respective investigational products.

Inclusion Criteria:

1. Subjects who received SB-318 under Study Protocol SB-318-1502, SB-913 under Study Protocol SB-913-1602, or SB-FIX under Study Protocol SB-FIX-1501
2. Subjects who have provided consent to participate in the LTFU study.

Exclusion Criteria:

1. Unable to comply with study visit schedule or study visit procedures.
2. Any other reason that, in the opinion of the Investigator or Medical Monitor, would render the subject unsuitable for participation in the study.

All subjects who have received SB-318 in Study Protocol SB-318-1502, SB-913 in Study Protocol SB-913-1602 or SB-FIX in Study Protocol SB-FIX-1501 and who have consented to participate in this Long Term Follow-up study.