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.
σ, defined in equation (6) vs. the number of patients n of clinical studies with CI available. The curves are fits of the function σ = a n –½ to all data (dashed curve) and to data shown with solid circles (solid curve), excluding the outliers (open squares). The values of the fitting parameter a in both cases are given
