Figure 1.

Developer-Reported Challenge Domains and Themes Displayed per Characteristic (Company Size, ATMP Type, and Development Stage)

Regulatory challenge distribution (A), technical challenge distribution (B), scientific challenge distribution (C), financial challenge distribution (D), clinical challenge distribution (E), human resource management challenge distribution (F), and other challenge distribution (G) per subgroup. Gray bars represent all developers per theme: company size (dark blue bars, SME; light blue bars, large company), ATMP type (dark green bars, GTMP; medium green bars, CTMP; light green bars, TEP; very dark green bars, combined ATMP), development stage (dark orange bars, phases I–II; medium orange bars, phase III; light orange bars, regulatory application and commercialization).