dr. shenton's kind of juxtapose nicely. part of your research is finding that baseline of the new athletes that enter university of nebraska. is this allowing you to detect the injuries earlier that there may have been some pre-existing subconcussion? how are you identifying that, what is it telling you, and what is the university doing to implement some level of protections? >> one of the major changes we've seen, and i think this is occurring across the field now, is the effort to get preconcussion data. so basically more schools are moving to assess student athletes prior to the start of the season. then that certainly is what we're doing. should a player be injured and they are identified through trainers or the medical team, one of the weaknesses here is that the players do not always self-identify. so we've run across that a number of times in our testing. we'll pick up something on our test the trainers and medical team didn't know about simply because the player didn't disclose. then we also tried to test somebody e