(The researchers) have to be able to justify the use of animals. It's extremely competitive.

As long as there's anything we don't know about how a body works.

We will not just stand by and let things happen.

The ability to feel pain must be a consideration.

Right now, animals are generally considered property. Animals do not have rights in the sense that humans have rights.

We strive to be perfect. We don't reach that, nor does anyone else.