THE FEATURES OF PREOPERATIVE MYOPENIA, MYOSTEATOSIS, AND PHYSICAL FUNCTION IN JAPANESE PATIENTS WITH GASTROINTESTINAL CANCER: A CROSS-SECTIONAL STUDY oleh Noriatsu Tatematsu, Takuya Yanagisawa, Mioko Horiuchi, Saki Migitaka, Shotaro Yasuda, Keita Itatsu, Tomoyuki Kubota, Hideshi Sugiura