%0 Journal Article %T Expression of surfactant protein B is dependent on cell density in H441 lung epithelial cells %A Markus Fehrholz %A Silvia Seidenspinner %A Steffen Kunzmann %J Archive of "PLoS ONE". %D 2017 %R 10.1371/journal.pone.0184556 %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5599067/