Gennadiy N. Lepeshkin: Well, usually whether an animal dies depends on the dose it receives. So, for example, the research is usually done as follows: there's some sort of vaccine that's been developed, for a certain pathogen. There are two groups of animals. One of the groups receives... there are two groups of animals. They receive a certain dose of the infectant. One group of animals gets the vaccine and the other doesn't. Then the vaccine's effectiveness is studied, i.e., how many animals die in each group. This is the universally accepted standard procedure, and there are certain approaches and working methods, record-keeping and so on and so forth. This kind of work is carried out in numerous laboratories the world over as part of the quality assessment of the vaccines developed. And we did this type of work too. We would see how, you know, the animals died, and take... there are special ways of doing research on animals that die from infection, studying their internal organs, how the infection spreads and so on. You know, there are special methods for describing what happens and drawing conclusions.