To do so, scientists from the National Human Genome Research Institute in Bethesda, Maryland, recruited 10 volunteers and asked them to wash with mild soap for 1 week.

• 为了完成这一调查比较，位于美国马里兰州贝赛斯达的国家人类基金组研究协会招录了10名志愿者，并请他们在一周中用温和香皂洗澡。