1. US FDA breakthrough therapy information page. https://www.fda.gov/patients/fast-track-breakthrough-therapy-accelerated-approval-priority-review/breakthrough-therapy.
2. US FDA guidance document expedited programs for serious conditions: drugs and biologics, May 2014. https://www.fda.gov/regulatory-information/search-fda-guidance-documents/expedited-programs-serious-conditions-drugs-and-biologics.
3. Enhanced early dialogue to facilitate accelerated assessment of priority medicines (PRIME), EMA/CHMP/57760/2015, Rev. 1. https://www.ema.europa.eu/en/documents/regulatory-procedural-guideline/enhanced-early-dialogue-facilitate-accelerated-assessment-priority-medicines-prime_en.pdf.
4. US FDA fast track, breakthrough therapy, accelerated approval, priority review information page. https://www.fda.gov/patients/learn-about-drug-and-device-approvals/fast-track-breakthrough-therapy-accelerated-approval-priority-review.
5. US FDA regenerative medicine advanced therapy designation information page. https://www.fda.gov/vaccines-blood-biologics/cellular-gene-therapy-products/regenerative-medicine-advanced-therapy-designation.