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.
In the forest plot, the difference between the control group and the experimental group of each subgroup was analyzed by mean difference (MD). Each subgroup is located at the top and bottom with PDE-5 inhibitors and ROCK inhibitors. Because of the high heterogeneity, each group was analyzed by dividing it into subgroups.
