‰ªŽRˆãŠw‰ï Acta Medica Okayama 0030-1558 113 3 2001 ’°ŠÇoŒŒ«‘å’°‹ÛŠ´õÇ 301 303 EN No potential conflict of interest relevant to this article was reported. ’°ŠÇoŒŒ«‘å’°‹Û Ve‚’o “Å‘f