1. Caffeine Increases the Antitumor Effect of Cisplatin in Human Hepatocellular Carcinoma Cells
   Yohei Kawano et al, 2012, Biological and Pharmaceutical Bulletin CrossRef
2. Long-Term Local Intensive Preoperative Chemotherapy and Joint-Preserving Conservative Surgery for Osteosarcoma Around the Knee
   Satoshi Abe et al, 2001, Orthopedics CrossRef