Thanks very much, Mr. Chair.
Chris, you said we don't diagnose most concussions, and then you said there are professional NFL players walking away because the risk is too high. How many NFL players are not coming forward to say that they have potentially been concussed? At this level, they probably know when they're concussed, but it's millions and millions of dollars. You have pressure from agents, pressure from coaches and interior pressure to make a living as well. How many concussions are going undiagnosed because of players not coming forward?