1. Second Division, Department of Internal Medicine Hamamatsu University School of Medicine 1‐20‐1 Handayama Higashi‐ku Hamamatsu 431‐3192 Japan
2. Department of Pulmonary Medicine Fujieda Municipal General Hospital 4‐1‐11 Surugadai Fujieda 426‐8677 Japan
3. Palliative and Supportive Care Division Seirei Mikahahara General Hospital 3453 Mikatahara, Kita‐ku Hamamatsu 433‐8558 Japan
4. Clinical Research Center National Hospital Organization Kinki‐Chuo Chest Medical Center 1180 Nagasone‐cho, Kita‐ku Sakai Osaka 591‐8555 Japan
5. Department of Psychosomatic Internal Medicine National Hospital Organization Kinki‐Chuo Chest Medical Center 1180 Nagasone‐cho, Kita‐ku Sakai Osaka 591‐8555 Japan
6. Department of Palliative Nursing, Health Sciences Tohoku University Graduate School of Medicine 2‐1 Seiryo‐machi, Aoba‐ku Sendai Miyagi 980‐8575 Japan
7. Department of Respiratory Medicine Kobe City Medical Center General Hospital 2‐1‐1 Minatojima‐minamimachi Kobe City Hyogo 650‐0047 Japan
8. Department of Respiratory Medicine Kobe City Medical Center West Hospital 4, 2‐chome, Ichibancho, Nagata‐ku Kobe Hyogo 653‐0013 Japan
9. Department of Respiratory Medicine and Allergy Tosei General Hospital 160 Nishioiwake‐cho Seto Aichi 489‐8642 Japan
10. Department of Palliative Care Medicine Tosei General Hospital 160 Nishioiwake‐cho Seto Aichi 489‐8642 Japan