Did you have both CLCN1 and SCN4a genes sequenced?
If you Google ""scn4a" PAM"; low on the first page of
results you should find a title reading:
"GP 102 SCN4A mutations in Finland".
This is an article abstract relating to CLCN1 R894X and
SCN4A R1460Q defects occuring together.
Sweden and Finland have the highest incedences of
defects in both of these genes so it would seem that
this population is most likely to defects in
them together.