BRUCE A.CARNES, S.JAY OLSHANSKY and LEONARD HAYFLICK have all studied aging for many years and spearheaded the drafting of the position statement on aging discussed in this essay.

• 卡内斯、欧宣斯基与黑弗利克三人，研究老化已有多年，并带头起草了这篇文章讨论到的老化立场声明。