Multiple Liver Metastases Rather Than the Presence of Liver Metastasis Is a Significantly Poor Prognostic Factor for Patients With Advanced Pancreatic Cancer. Issue 7 (August 2020) - Iede, Kiyotsugu; Yamada, Terumasa; Kato, Ryo; Ueda, Masami; Tsuda, Yujiro; Nakashima, Shinsuke; Ohta, Katsuya; Matsuyama, Jin; Ikenaga, Masakazu; Tominaga, Shusei