One of the things we looked at is genetics. Here’s a study that was done with Drs. Robert Ferrell and Carl Huber here in Pittsburgh. We showed that about 20% of women in Pittsburgh who had preeclampsia in their first pregnancy have an abnormality in lipoprotein lipase as compared to about 5% of the general population. A friend of ours looked at a Caucasian population in North Carolina and didn’t find it. Homocysteine has been recorded in some places and not others, the same with angiotensinogen. There are probably a lot of different explanations for that, but one of them could very well be that there are different reasons why different populations get preeclampsia.