Correction: Article on Role of Angiopoietin-1 in Tumor Metastasis

In the article on the role of angiopoietin-1 in tumor metastasis in the June 1, 2009 issue of Cancer Research (1), the authors and affiliations should have appeared as follows:

Tanja Holopainen,² Huilian Huang,¹ Caiping Chen,¹ Kyung Eun Kim,³ Luqing Zhang,¹ Fei Zhou,¹ Wencan Han,¹ Chaojun Li,¹ Jun Yu,⁴ Jun Wu,⁴ Gou Young Koh,³ Kari Alitalo,² and Yulong He¹

¹Laboratory of Vascular and Cancer Biology, MOE Key Laboratory of Model Animal for Disease Study, Model Animal Research Institute, Nanjing University, Nanjing, China; ²Molecular/Cancer Biology Laboratory, Biomedicum Helsinki, Department of Pathology, Haartman Institute and Helsinki University Central Hospital, University of Helsinki, Helsinki, Finland; ³Biomedical Research Center and Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, Korea; and ⁴Shanghai Genomics, Inc., Shanghai, China