1932     11 Nov. 446/2  				The cell strain derived from the 17-day-old embryo showed a rate of cell multiplication that was consistently higher.
1958     81 426/1  				Advances in tissue culture techniques have made available numerous stable cell strains..which have contributed to recent developments in virology.
2004     101 5946/2  				Cell strains containing expression plasmids were grown aerobically.