Dr. Riddell, I'll go back to you for a second. I want to go back to some of your earliest commentary. In the work that you were doing in two of the four phases of that initiative, you mentioned that you were studying the arrival or presence of various pathogens in the salmon population. Do you have any sense of timing as to when some of those may have all of a sudden become factors? In particular, is there a connection you could draw from the data between the arrival of pathogens and the arrival of aquaculture on the west coast?