Sha Liu1, Hua Jiang1, Lv-Yin Huang2, Dong-Zhi Li3. 1. Department of Hematology/Oncology, Guangzhou Women & Children Medical Center affiliated to Guangzhou Medical University, Guangzhou, Guangdong, China. 2. Molecular Genetics Unit, Guangzhou Women & Children Medical Center affiliated to Guangzhou Medical University, Jinsui Road 9, Zhujiang New Town, Guangzhou, Guangdong, 510623, China. 3. Molecular Genetics Unit, Guangzhou Women & Children Medical Center affiliated to Guangzhou Medical University, Jinsui Road 9, Zhujiang New Town, Guangzhou, Guangdong, 510623, China. drlidongzhi2014@sina.com.