I think one of the most important ways to manage study recruitment and make sure you're on target throughout the course of your study is to monitor it on a very, very routine basis. And that's why you need study personnel and research assistants to be keeping track of those things, to be up on data entry, so that the data in there, so the tracking reports for example can be generated on a weekly basis.

One of the most important things that we've done in our research studies is to have an actual recruitment log that we see the projections cut across, so if we have a graph, the graph is cut across the demographic characteristics that we're trying to get in terms of a representative sample.

So we have a line for men, a line for women. We have a line for racial and ethnic breakdowns, so we can get a better sense of the trajectories for our recruitment efforts and know where we really need to focus our recruitment efforts based on monitoring it very closely and routinely.