Möllerström et al. BMC Cancer 2010, 10:296 http://www.biomedcentral.com/1471-2407/10/296 Page 9 of 11 Figure 6 Correlation plot for the expression of the analyzed proteins. The strongest correlations were found between ADIPOR1 and ADORA1, as well as BTG2 overall expression and BTG2 cytoplasm expression. The course of the circle indicates whether the correlation is positive or negative. tumour sets are needed to validate and establish BTG2 protein expression as a prognostic marker. List of abbreviations AUC: Area Under the Receiver Operating Characteristic Curve; C-index: Concordance index; CGH: Compatative Genome Hybridisation; DNA: Deoxyribonucleic Acid; IHC: Immunohistochemistry; TMA: Tissue Microarray. Competing interests The authors declare that they have no competing interests. Authors' contributions KL, EK and AD performed the immunohistochemistry. AK evaluated the immu- nostained tissue microarrays. EK performed the 5-year survival analysis. SN per- formed the multivariate analysis. DB performed the molecular analyses (such as ER, PR, HER2) and KJ provided the tissue microarrays as well as the clinical information. EK, UD, AD, TP, PK, KJ and KH interpreted the results and wrote the paper. All authors read and approved the final manuscript. KH was responsible for supervision as well as providing the funding. Acknowledgements This work was performed at the Department of Oncology, Göteborg University, Sweden and was supported by The King Gustav V Jubilee Clinic Cancer Research Foundation.