Plönes T, Krohn A, Burger M, Veelken H, Passlick B, Müller-Quernheim J, Zissel G. Serum Level of CC-Chemokine Ligand 18 Is Increased in Patients with Non-Small-Cell Lung Cancer and Correlates with Survival Time in Adenocarcinomas. PLoS ONE. 2012 Jul 25;7(7):e41746. doi: 10.1371/journal.pone.0041746.