1. Central Pharmaceutical Research Institute, Japan Tobacco, 1-1 Murasaki-cho, Takatsuki, Osaka 569-1125, Japan
2. Pharmaceutical Frontier Research Laboratory, Japan Tobacco, 1-13-2 Fukuura, Kanazawa-ku, Yokohama, Kanagawa 236-0004, Japan
3. Oncology R&D, GlaxoSmithKline, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426, United States