Early: Phase I/IIaLate: Phase IIb/IIIPost-Approval Studies RWEPhase IIIB/IV studieslate phase studiespost-approval studies White Paper 4 February 2025 Designing an optimal long-term follow- up program for gene therapies and genetically modified cell therapies Download PDF Share Share Share on Facebook Share on Linkedin Share on Twitter Share on Threads Share via Email Copy link to clipboard