[1] Xuzhou Med Univ, Affiliated Huaian Hosp, Dept Oncol, Huaian, Jiangsu, Peoples R China
[2] Second Peoples Hosp Huaian, Huaian, Jiangsu, Peoples R China
[3] Hongze Dist Peoples Hosp, Dept Resp Med, Hongze, Jiangsu, Peoples R China
[4] Huaiyin Hosp Huaian City, Dept Oncol, 38 Beijing West Rd, Huaian 223300, Jiangsu, Peoples R China
[5] Xuzhou Med Univ, Affiliated Hosp, Dept Oncol, 99 Huaihai West Rd, Xuzhou 221006, Jiangsu, Peoples R China