This file is probably misnamed.
*TODO*: Update name once we know where this fits
We no longer use centiMorgan in GeneNetwork
From the email threads:
> … > Sorry, we now generally do not use centimorgans. Chr 19 is 57 cM > using markers that exclude telomeres in most crosses. > …
and
> … > I know that cM is a bit more variable because it's not a direct measurement, … > …
The uploader will store any provided physical location values (in megabasepairs) in the
specifically in the `Mb` field of that table.