Minorities have been disproportionately lead poisoned.  Of course there will be higher levels of high blood pressure, vision problems, and glaucoma - among other things.  Nothing will be found in genes.  Instead, to justify their existence, the authors will expand the search to a large group of genes and make some silly claim that they were able to locate some association based on an unconventional equation using speculation and surmise.  Big waste of taxpayer money.