Enhanced expression of SPARC/osteonectin in the tumor-associated stroma of non-small cell lung cancer is correlated with markers of hypoxia/acidity and with poor prognosis of patients

Michael I. Koukourakis, Alexandra Giatromanolaki, Rolf A. Brekken, Efthimios Sivridis, Kevin C. Gatter, Adrian L. Harris, E. Helene Sage