1. Department of Thoracic Surgery; Tokyo Women's Medical University Yachiyo Medical Center; Yachiyo Chiba Japan
2. Chiba Foundation for Health Promotion and Disease Prevention; Chiba Chiba Japan
3. Department of Health and Welfare, Ciba City; Chiba Chiba Japan
4. Chiba City Medical Association; Chiba Chiba Japan
5. Department of Medical Oncology; Graduate School of Medicine; Chiba University; Chiba Chiba Japan
6. Department of Pulmonary Medicine; Graduate School of Medicine; Chiba University; Chiba Chiba Japan