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.
Examples of the relationship between the ETsevo concentration, the Narcotrend index and the density spectral array (DSA) colour spectrum in each age group; (a) represents a 3‐month‐old infant, a 9‐month‐old infant is represented in (b), and (c) represents a 38‐month‐old child. The red line indicates Narcotrend index and the blue line ETsevo concentration.
