You might start at
McKusick's Mendelian inheritance in man web site at
http://www3.ncbi.nlm.nih.gov/omim/
Write schizophrenia in the search engine and you should have a list
within minutes. You can click on any one of the selections and the
selected topic will contain clinical info, genetic location, references
etc. The site maintains one of the most comprehensive lists/references of
all known human genetic diseases and is an integral part of the genome
project.
Anothe site worth exploring is
Entrez Browser at http://www3.ncbi.nlm.nih.gov/Entrez/index.html
Once connected, click on medline, and enter the the keywords. This search
engine will turn up current literature on the keyword complete with
author(s), title of article, journal title and volume and date published
and you can also download abstracts of the article.
Good luck
Rcjohnsen at aol.com