Diversity in the supply chain is obviously very important. Diversity of testing modes of course is important, and each of you has highlighted the features of the different kinds of testing that you are involved with.
Perhaps I'll go to Mr. Whalen first. Can you highlight for the committee again the advantages of—if I'm getting this term right—lab-based testing?
Mr. Lem, of course you have a more instant-type testing regime. Perhaps you could outline the advantages of that.