Corresponding Author

Children’s Medical Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120 P.R.China

Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China, 510120 P.R. China

These corresponding authors have contributed equally to this work as corresponding authors

Corresponding author:

Dun-hua Zhou, Kun-yin Qiu, Department of Paediatrics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Tel: +8613560413983; Fax:020-81332630;

E-mail:zhoudunh@mail.sysu.edu.cn; qiuky@mail2.sysu.edu.cn.