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.