[1] Southern Med Univ, Nanfang Hosp, Dept Hematol, Guangzhou, Peoples R China
[2] Shantou Univ, Yuebei Peoples Hosp, Shaoguan, Peoples R China
[3] Zhongshan City Peoples Hosp, Dept Hematol, Zhongshan, Peoples R China
[4] Zhaoqing First Peoples Hosp, Dept Hematol, Zhaoqing, Peoples R China