There may be a genetic link, because the disease seems to run in families.

It's not clear why, but there may be a genetic link.

They run in families, and experts have found a genetic link.

The business goes way back in our family, so maybe there is a genetic link.

Either way, there won't be a test until researchers find a genetic link.

The fact that both developed the disease suggested a genetic link.

The result is a child with genetic links to both parents.

The reason for this is not clear, but there may be a genetic link.

However, genetic links have been found in a few families.

One incident has been reported of a possible genetic link.