Interesting. Wikipedia makes that 80% claim, citing: Aschacher; Wolf; Enzmann; Kienzl (2015). "ALINE-1 induces hTERT and ensures telomere maintenance in tumour

Interesting. Wikipedia makes that 80% claim, citing: Aschacher; Wolf; Enzmann; Kienzl (2015). "ALINE-1 induces hTERT and ensures telomere maintenance in tumour cell lines". Oncogene. doi:10.1038/onc.2015.65. Aschacher et al write: "In about 80% of tumour cells, telomere maintenance is controlled by telomerase (TA), a reverse transcriptase, which adds DNA repeats onto chromosomal ends."12, 22, 23, 24, 25 I checked all five references and none had anything about this 80% of tumors number. It appears to be made up.