[Wang, Yi; Zhang, Yunsheng; Liu, Luogen] Univ South China, Affiliated Hosp 2, Clin Res Inst, Hengyang 421001, Peoples R China.
[Li, Fang] Hunan Polytech Environm & Biol, Coll Nursing, Hengyang 421005, Peoples R China.
[Wang, Yi; Wu, Tao; Jiang, Xianxun; Jiang, Hongtao] Univ South China, Affiliated Hosp 2, Dept Urol, Hengyang 421001, Peoples R China.
[Du, Xiaobo] First Peoples Hosp Yueyang, Dept Urol, Yueyang 414000, Peoples R China.