Correction to: Laboratory Investigation (2009) 89, 668–675; doi:10.1038/labinvest.2009.18

In this article, the authors have identified errors in the Acknowledgments; it should be read as follows:

The authors thank the orthopedic surgeons at the University Hospital in Lund, the Scandinavian Sarcoma Group registry for histopathological data (necrosis, vascular invasion, depth, and size), Professor Fredrik Mertens for providing cytogenetic data on liposarcomas, Anna Isinger for valuable discussion, and Johan Staaf for running the poplowess algorithm in BASE. AC has a fellowship from the Portuguese Foundation for Science and Technology (SFRH/BD/27561/2006).