[1] Shimane Univ, Fac Med, Matsue, Shimane, Japan
[2] Shimane Univ Hosp, Gen Med Ctr, 89-1 Enya Cho, Izumoshi, Shimane 6938501, Japan
[3] VA Ann Arbor Healthcare Syst, Med Serv, Ann Arbor, MI 48105 USA
[4] Univ Michigan, Med sch, Dept Internal Med, Ann Arbor, MI 48109 USA
[5] Nikkei BP, Nikkei Med Editorial Dept, Tokyo, Japan
[6] Muribushi Okinawa Project Teaching Hosp, Okinawa, Japan
[7] Okayama Univ, Divers & Inclus Ctr, Okayama, Japan