Tab. 5. Studies showing misidentified cell lines in various studies over time.

1968: 100% (18) HeLa

1974: 45% (20) HeLa

1976: 30% (246) wrong (14% wrong species)

1977: 15% (279) wrong

1981: about 100 contaminations in cells from 103 sources

1984: 35% (257) wrong

1999: 15% (189) wrong

2003: 15% (550) wrong

2007: 18% (100) wrong

Percentage of misidentified cell lines; total cell lines analyzed in brackets. These studies were extracted from (Hughes et al., 2007); c.f. references and more information.