Fig. 2.

Analysis of origin of cells (autologous or allogeneic) used for cell therapy and cartilage repair in clinical trials registered in ClinicalTrials.gov. a Percentage of each origin of cells relative to the total number of studies. b Each study is color-coded by corresponding origin of cells and displayed from the start year to the (planned) completion year, sorted by start year in chronological order. Shaded column: current year (2018) to 2025. Since 2018, a trial bar displays if the trial is registered. Please note that we could not show if the trial continued or was halted prematurely. Vertical-striped bar indicates “suspended,” “terminated,” or “withdrawn” study