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.
Kaplan-Meier survival evaluating treatment dropout and relapse.
NI+OP indicates 1000-mg naltrexone implantandoral placebo (n=102);
PI+NO, placebo implant and 50-mg oral naltrexone hydrochloride (n=102);
PI+OP, placebo implant and oral placebo (n=102).
