Ziet er volgens mij ook hoopvol uit:
https://www.sciencedaily.com/release...0302204627.htm
Van 02/03/2016; "
Stem cells residing in hair follicles are held in an inactive state for long periods of time. A new study shows that these quiescent periods are essential for maintaining the cells' rejuvenating activity over time, and clarifies the mechanisms that bring the cells in and out of quiescence."