Note: The discrepancy in spelling ("ageing" vs. "aging") is in the original.
To indicate this more concisely, you can put [sic] after "Ageing" in the quote.
This might be better received in the open thread, although I agree that this looks interesting enough that it isn't unreasonable to include it here. I'm not sure why it has been downvoted so much.
The paper is called DNA methylation age and human tissues and cell types and it's from Genome Biology. Here is a Nature article based on the paper.
I have submitted this to LW because of its relevance to the measurement of aging and, hence, to life extension. Here is a bit from the Nature piece:
Note: The discrepancy in spelling ("ageing" vs. "aging") is in the original.