Would you say that even though humans do not exhibit a certain event that
is seen in animals, the investigations in animals is worthwhile? If so,
why? If not, why? It seems to me that models for risk in humans may not
be the same as models to study a certain process, that may or may not
accur in humans. If the process does not occur in humans while it does in
an animal, then perhaps the question becomes why does it happen in animals
and not in humans? Any thoughts????