Alexis Carrel, a Nobel prize-winning surgeon, had stated "that all cells explanted in culture are immortal, and that the lack of continuous cell replication was due to ignorance on how best to cultivate the cells".
Alexis Carrel, cirurxián gañador do premio Nobel, afirmara que "todas as células explantadas en cultivo son inmortais, e que a ausencia dunha replicación continua era debida ao descoñecemento de cales son as condicións óptimas para cultivar as células".