Makiyama, A., Kunieda, K., Noguchi, M., Kajiwara, T., Tamura, T., Takeda, K., … Esaki, T. (2018). First-line chemotherapy with S-1 alone or S-1 plus cisplatin for elderly patients with advanced gastric cancer: a multicenter propensity score matched study. Gastric Cancer : Official Journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association. https://doi.org/10.1007/s10120-018-0797-y (Original work published 2018)