The plots on this page display participating sites in North America, Europe, and Asia.

How to use

• Hover over a city to view the number of sites and number of hospitals contributing data.

• To download the figure click the button with the ellipsis in the top right corner and choose either “Save as SVG” or “Save as PNG”. The figure will be saved reflecting the current state.

This website and its contents herein, including all data, visualization, and analysis, is provided to the public strictly for academic research purposes. The data has numerous limitations and confounders that need to be better evaluated as more data is acquired. Reliance on this website for medical guidance or clinical judgement is strictly prohibited.