Preoperative sarcopenia combined with prognostic nutritional index predicts long-term prognosis of radical gastrectomy with advanced gastric cancer: a comprehensive analysis of two... oleh Yubo Han, Ju Wu, Rui Ji, Hao Tan, Simiao Tian, Jiajun Yin, Jian Xu, Xi Chen, Wenfei Liu, Hongzhang Cui