Yeah this is a minor part of his work. I know people who specialize in personality-health relationships and have never heard them base anything on Eysencks work in that area. Conversely, I'm very familiar with Eysencks work in general but have never heard of this.

Having said that, there are a couple of studies I've wondered about, and this makes me think about a second look at them. They too aren't what he's most known for though, which is more in the area of measurement.