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.
Effect of a forest bathing trip (a, n = 12) and a city tourist visit (b, n = 11) on NK activity. Data are presented as the mean ± SE. *P < 0.05, **P < 0.01, significantly different from before the trip by paired t test. Cited from Li et al. [3]
