American Journal of Gastroenterology Style
First time I made my own style but it seems to work. At least for journals, haven't tried it on books, etc. I did get some errors when I tried the online validator. However I got errors when I loaded Vancouver as well so I think it's a parsing issue.
Here is the link:
http://gist.github.com/631736
Here is the link:
http://gist.github.com/631736
Did you validate against the 1.0 csl?