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. Author manuscript; available in PMC: 2022 Jan 1.
Published in final edited form as: Biomaterials. 2020 Nov 5;267:120491. doi: 10.1016/j.biomaterials.2020.120491

Figure 4.

Figure 4.

Overview of clinical trials included in the study. (i) General outline of the categorization of microneedles and their uses in clinical trials. (ii) Total number of registered clinical trials involving the use of microneedles listed in ClinicalTrials.gov on Oct. 18, 2018 (N=79): a) classification of clinical trials based on number of clinical trials at various stages each year, b) percentage of clinical trials at each stage, c) percentage of clinical trials having different status. A full listing of clinical trials is shown in Table S2 in SI.