In this case, we were referring, again, to the issues of understanding the limitations and capacities of the tool. So if we have individuals who have these kinds of geographic conditions, can the tool be used in such a way that it will give us the information to monitor an individual in that way?
From that perspective, we understood the capacities of the tool. We also understood the limitations as that relates to the comments around drift. We know that there is some drift, but it's not a 60-mile drift, at least not with the equipment we were dealing with. So we understood that. But again, the purpose of the pilot was to test out the test equipment.