1. Department of Thoracic Oncology, Aichi Cancer Center Hospital, 1-1 Kanokoden, Chikusa-ku, Nagoya, Aichi 464-8681, Japan
2. Department of Pathology and Molecular Diagnosis, Aichi Cancer Center Hospital, Nagoya, Aichi, Japan
3. Department of Thoracic Oncology, Kanagawa Cancer Center, Asahi-ku, Yokohama, Japan
4. Department of Thoracic Oncology, Osaka International Cancer Institute, Chuo-ku, Osaka, Japan
5. Department of Thoracic Oncology, Kansai Medical University Hospital, Hirakata, Osaka, Japan
6. Statistics Group, AstraZeneca, Kita-ku, Osaka, Japan
7. Medical Department, AstraZeneca, Kita-ku, Osaka, Japan
8. Department of Medical Oncology, Faculty of Medicine & Graduate School of Medicine, Hokkaido University, Sapporo, Japan