A Prognostic Model in Metastatic or Recurrent Gastric Cancer Patients with Good Performance Status Who Received First-Line ChemotherapyWang Jin; Qu Jinglei; Li Zhi; Che Xiaofang; Zhang Jingdong; Liu Jing; Teng Yuee; Jin Bo; Zhao Mingfang; Liu Yunpeng; Qu XiujuanSCI-摘要-关键词-