「口にお金を入れる」のはやめよう―紙幣に膨大なバクテリアThis copy is for your personal, non-commercial use only. Distribution and use of this material are governed by our Subscriber Agreement and by copyright law. For non-personal use or to order multiple copies, please contact Dow Jones Reprints at 1-800-843-0008 or visit www.djreprints.com. http://jp.wsj.com/article/SB10001424052702303595604579514490653639008.html
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