Okay. Thank you, Dr. Prentice.
I would like to move to our friends at PIAC.
You mentioned, in your opening comments, that there are barriers to entry for competitors. You gave, I think, five or six recommendations to deal with those barriers, but I didn't hear a clear articulation of the barriers. I think there's about a minute and a half left. I wonder if you could give us a rundown of what you see as the barriers.