[1] Tohoku Univ, Sch Med, Dept Palliat Med, Sendai, Miyagi, Japan
[2] Takeda Gen Hosp, Dept Palliat Med, Aizu Wakamatsu, Fukushima, Japan
[3] Dongguk Univ, Ilsan Hosp, Dept Family Med, Hosp & Palliat Care Ctr, Goyang Si, South Korea
[4] Dongguk Univ, Med Sch, Dept Med, Pildong 1-30, Seoul, South Korea
[5] Dongguk Univ, Dept Stat, Seoul, South Korea
[6] Catholic Kwandong Univ, Int St Marys Hosp, Sch Med, Dept Family Med, Incheon, South Korea
[7] Natl Taiwan Univ, Dept Family Med, Coll Med & Hosp, Taipei, Taiwan
[8] Kaohsiung Med Univ, Kaohsiung Med Univ Hosp, Dept Family Med, Kaohsiung, Taiwan
[9] Kaohsiung Med Univ, Sch Med, Kaohsiung, Taiwan
[10] UCL, Div Psychiat, Marie Curie Palliat Care Res Dept, London, England
[11] Chungnam Natl Univ Hosp, Dept Family Med, Daejeon, South Korea
[12] Ulsan Univ, Ulsan Univ Hosp, Coll Med, Dept Hematol & Oncol, Ulsan, South Korea
[13] Seoul Metropolitan Govt, Seobuk Hosp, Dept Family Med, Hosp & Palliat Care Ctr, Seoul, South Korea
[14] Univ Texas MD Anderson Canc Ctr, Dept Palliat Care Rehabil & Integrat Med, Houston, TX 77030 USA
[15] Kobe Univ, Grad Sch Med, Dept Palliat Med, Kobe, Hyogo, Japan
[16] Seirei Mikatahara Gen Hosp, Div Palliat & Support Care, Hamamatsu, Shizuoka, Japan
[17] Kyoto Univ, Grad Sch Med, Dept Human Hlth Sci, Kyoto, Japan