Copper oxide nanoparticles induce collagen deposition via TGF-β1/Smad3 signaling in human airway epithelial cells. - Ko, Je-Won; Shin, Na-Rae; Park, Ji-Won; Park, Sung-Hyeuk; Lee, In-Chul; Kim, Joong-Sun; Kim, Jong-Choon; Ahn, Kyung-Seop; Shin, In-Sik (Nanotoxicology, 2018)