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.
pH‐responsive HSHs for systemic and oral drug delivery. Synthesis pathways of CS nanohydrogel networks: a) CNHN I, b) CNHN III, c) CNHN II. d) Classification of hydrogels for oral and systemic drug delivery. Adapted with permission.[ 129 ] Copyright 2022, Elsevier Ltd.
