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.
Product of alveolar methane concentration and alveolar ventilation during the ergometer test. Average values of the subjects (n = 5) with error bars indicating standard deviation are plotted. The alveolar methane concentration and alveolar ventilation were estimated as given in sections 2.4 and 2.5.
