Erratum to: J Cancer Res Clin Oncol (2012) 138:1717–1725 DOI 10.1007/s00432-012-1219-x

In the original publication, the order in the author group was incorrect. The correct order of authors is given below.

Ying Jin · Yan-Xia Shi · Xiu-Yu Cai · Xi-Ya Xia · Yu-Chen Cai · Ye Cao · Wei-Dong Zhang · Wei-Han Hu · Wen-Qi Jiang

Also, the name of one of the co-authors was missed in the contribution line. The amended statement is given below.

Xiu-Yu Cai, Yan-Xia Shi, Ying Jin contributed equally to this work.