A Feasibility Study of UFT/LV and Irinotecan (TEGAFIRI) in Advanced or Metastatic Colorectal Cancer: Osaka Gastrointestinal Cancer Chemotherapy Study Group (OGSG) PROG 0304
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Phase II Study of a Combination of S-1 and Paclitaxel in Patients with Unresectable or Metastatic Gastric Cancer（OGSG0105）
Multi-Center Phase II Study for Combination Therapy with Paclitaxel/Doxifluridine to Treat Advanced/Recurrent Gastric Cancer Showing Resistance to S-1 (OGSG0302)
Phase II study of a combination of iIrinotecan and S-1 in patients with advanced gastric cancer (OGSG0002)
Multicenter phase II study of irinotecan plus bolus fluoroutacil/l-leucovorin for metastasic colorectal cancer（OGSG0201）
Multicenter phase II study of 2 weeks administration with TS-1 followed by 1 week rest against metastatic gastric cancer
Phase I/II Study of CPT-11 plus UFT in Patients with Advanced/Recurrent Colorectal Cancer: Osaka Gastrointestinal Cancer Chemotherapy Study Group（OGSG0102）
PhaseII study of protracted irinotecan infusion and a low-dose cisplatinfor metastatic gastric cancer
Multicenter phase II study of antimicrobial prophylaxis in low-risk patients undergoing distal gastrectomy for gastic cancer
Phase I and pharmacokinetic study of S-1 combined with weekly paclitaxel in patients with advanced gastric cancer