Gotta be real careful in accepting these "Gene studies". Long threads here on FR last year seemed to indicate most such studies were at least "badly tainted" with the self interest of the sponsors and researchers. The "research results" always seemed to meet the expectations of the financial sponsors. Other experts blasted their integrity.
I know and agree. But, when it is the only lead available, I follow it until it is dis-proved. (It's included into a big pile of other information that will someday 'shake-out')