I came across this website infinome.me which relates SNPs to a few different diseases. On their site, if you click on a pubmed article, they give you a list of all the SNPs mentioned in that article along with the p-value (relating the SNP to the disease). Heres a screenshot:
^^ scroll to the right to see full image.
Is there an online database where I can download this kind of information, like for example if I'm interested in schizophrenia, I can get some articles with the list of SNPs they tested and their corresponding p-values?