Effects of sample handling on the stability of interleukin-6 in patients with breast neoplasms oleh Wang Yunxiu, Wang Baiye, She Lanhui, Wang Jijuan, Chen Yingting, Huang Di, Han Guang, Lu Miaolian, Wu Xiaobin, Wan Zemin, He Min, Ke Peifeng, Huang Xianzhang, Liu Hongcan