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Figure 4. General distribution of therapeutic areas and related rare diseases among the identified studies related to gene therapies in Europe. (A) Distribution of therapeutic areas concerned by clinical studies considered as Gene therapies in rare diseases from 01/01/2017 to 01/01/2023 (n = 93); (B) Graphic representation of the absolute number of Clinical studies involved in each related therapeutic area from phase I to phase III. The absolute numbers of involved clinical studies are presented on the right of each diagram; (C) Graphic representation of the absolute number of clinical studies involved in each related pathology from phase I to phase III. Relative Therapeutic areas associated with pathologies are presented on the left. The absolute numbers of involved clinical trials are presented on the right of each plot.