{it is known|not a secret|indisputable fact} that adult stem cells have a {definite|specific|limited|established|conditioned} {term|time interval} in vitro service and {practically|currently} imperceptibly enter the stage of replicative aging after {the first days|beginning} of cultivation in {conditions|in vitro #file_links["C:\Users\Admin\Desktop\file\gsa+en+30k60k120k240kGeorgiy231224URLBB.txt",1,N] situations|circumstances|settings.