[1] Univ Hamburg, Med Ctr, Inst Med Psychol, D-20246 Hamburg, Germany
[2] Kinki Univ, Sakai Hosp, Dept Psychosomat Med, Osaka, Japan
[3] Korea Canc Ctr Hosp, Dept Neuropsychiat, Seoul, South Korea
[4] Kinki Univ Hosp, Dept Surg, Sch Med, Osaka, Japan
[5] Korea Canc Ctr Hosp, Dept Surg, Seoul, South Korea