The researchers recruited 16 healthyvolunteer subjects for the study. They were not tobacco users and were not allowed to take any pharmaceuticals for two weeks.
研究人员们为这项研究招募了16个健康的志愿者。他们不是烟草使用者，并且在两周内不允许服用任何药物。
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Methods: The 16 healthy male volunteer athletes were divided into two teams, No1 and No2.
研究方法：实验对象为16名健康男运动员志愿者。
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BOSTON (Reuters) - Doctors in St. Louis said they have successfully transplanted a full ovary from a volunteer, allowing her infertile twin sister to give birth to a healthy baby girl on November 11.