Fig 2. Geographic distribution of patients.
Locations of patients included in the individual patient data meta-analysis. The number indicates the number of participants included from each location.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.