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.
a) The number of ancestral predicates underlying surgical meshes cleared by the FDA between 2013–2015. Each surgical mesh has on average 33 ancestral predicates, but the number of ancestors differs widely between meshes b) the number of devices in our dataset (n = 477) cleared by the FDA each year from prior to the 1976 Medical Device Amendment Act 2015 (i.e. < 1976) to 2015.
