1. Department of Thoracic Surgery; Graduate School of Medicine; Kyoto University; 54 Kawaharacho, Shogoin Sakyo-ku Kyoto 606-8507 Japan
2. Laboratory of Cancer Cell Biology; Radiation Biology Center; Kyoto University; Yoshida Konoecho Sakyo-ku Kyoto 606-8501 Japan
3. Precursory Research for Embryonic Science and Technology (PRESTO); Japan Science and Technology Agency (JST); 4-1-8 Honcho Saitama 332-0012 Japan