JDTAY
Half Pepperoni, All Cheese
German populations with infrequent CHEK2*1100delC and minor associations with early-onset and familial breast cancer - PubMed
CHEK2*1100delC is associated with a twofold increased breast cancer risk. This was shown in a collaborative analysis of European populations, but not in other populations from Europe and the US. Accordingly, there is a need to clarify the role of CHEK2*1100delC in breast cancer. We established...
pubmed.ncbi.nlm.nih.gov
This article is the top hit for "CHEK2 Germany" and mentions Northrhine-Westphalia for some reason. I've seen that region in my mom's ancestry. It doesn't exactly say that Northrhine-Westphalia has a lot of CHEK2 1100delC though, just that they studied it there.