<a href="http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;20170049" rel="nofollow">http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pubmed&#x2F;20170049</a><p>Seems to conclude latitude doesn&#x27;t make any difference, which is surprising. But there are other papers with the opposite conclusion.