[1] UTANO NATL HOSP,CLIN RES CTR,NARUTAKI,KYOTO 616,JAPAN
[2] NATL KYUSHU CANC CTR HOSP,FUKUOKA 815,JAPAN
[3] TOKYO METROPOLITAN GERIATR HOSP & INST GERONTOL,TOKYO 173,JAPAN
[4] FUKUOKA UNIV,SCH MED,FUKUOKA 81401,JAPAN
[5] STANFORD UNIV,MED CTR,SCH MED,STANFORD,CA 94305