3439 Prognostic factors in soft tissue sarcoma patients with lung metastases only receiving first-line chemotherapy. An exploratory, retrospective analysis on fifteen trials of the European Organization for Research and Treatment of Cancer - Soft Tissue and Bone Sarcoma Group (EORTC-STBSG). (September 2015) - Lindner, L.; Litiere, S.; Sleijfer, S.; Judson, I.; Italiano, A.; Kasper, B.; Gelderblom, H.; Marreaud, S.; Wardelmann, E.; Gronchi, A.; Graaf, W. Van der