diff --git a/vignettes/advs.Rmd b/vignettes/advs.Rmd
index f4e812e..1d8b1ea 100644
--- a/vignettes/advs.Rmd
+++ b/vignettes/advs.Rmd
@@ -419,7 +419,7 @@ arguments.
 
 Once again, it is essential to remember the importance of the metadata being
 supplied to the above function via the `meta_criteria` argument.
-Our default case from this package uses WHO standards for children \< 2 years of
+Our default case from this package uses WHO reference data for children \< 2 years of
 age and CDC reference data for children \>= 2 years of age. As the user, you can 
 use other (e.g., IOTF) reference data files created with the LMS method.