Anastasia Papaporfyriou et al.
Chest, 146(4), 951-958 (2014-06-06)
Osteopontin (OPN) is a phosphorylated acidic glycoprotein that can function as both an extracellular matrix molecule and a cytokine. Published data support that OPN is upregulated in surgical lung tissue samples of patients with COPD. The aim of this study