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.
Flow diagram following the recruitment, enrollment, and number of subjects that finished treatment of the clinical trial at low altitude (A) and high altitude (B). Low altitude: Chi square: 0.11; p = 0.99 with respect to subjects who failed to complete the follow-up among different groups of treatment. High altitude: Chi square: 0.6; p = 0.99 with respect to subjects who failed to complete the follow-up among different treatment groups.
