In which country did scientists grow a pancreas of the mouse in the body of rats?

jsh, Sadly, the experiment is not meant to benefit the animal, but rather to potentially benefit people who's organ is failing.

Beaker, I imagine that the organ was grown inside the host animal.

why? , what purpose does it serve? and surely the animal would try and get the foreign object (because that's what it is) off it and cause an injury to itself...unless the technicians did something to the animals to stop them....

Do these experiments ever benefit the animals that are used?