 And then, as you're saying, a lot of it is just nearly impossible to measure. I mean, quite frankly, we're swimming in a sea of chemicals all the time. But, Dr. Ng, let me turn back to you on something. Are we also seeing sort of a differential rise in rates when it comes to people of different socioeconomic status, or race is always a question when it comes to things like cancer, or is it kind of like across the board an equal increase?