Before revision: 1987; Nooden and Tompson 1995; Frolkis 1988a), have shown that the number of cell divisions can be considerably greater than that stipulated by the "Hayflick Limit" , having practically no limit at all.
After revision: 1987; Nooden and Tompson 1995; Frolkis 1988a), have shown that the number of cell divisions can be considerably greater than that stipulated by the Hayflick limit , having practically no limit at all.