Wynn-Williams A, McCulloch P
J Pathol. 1977 Aug;122(4):225-8. doi: 10.1002/path.1711220407.
In the Nude mouse: 1. Xenografts of human tumours often grew successfully. 2. There was very little growth in allografts of actively-growing normal tissue from Swiss mice. 3. Transplants of mature tissue from the toad failed to grow.