1. Department of Medical Oncology, Kinki University School of Medicine, 377-2 Ohno-higashi, Osaka-Sayama, Osaka 589-8511, Japan chi-okamoto@ dotd.med.kindai.ac.jp
2. Department of Thoracic Surgery, Aichi Cancer Center Hospital, Nagoya, Japan
3. Department of Medical Oncology, Kinki University School of Medicine, Osaka, Japan
4. Department of Medical Oncology, Kinki University School of Medicine, Sakai Hospital, Osaka, Japan