Received as Germ Free animals from Charles River Breeding Laboratories, USA (1983).
Charles River rederived F68 from NIH in 1960 to SPF status, NIH received as F51 (1950) from Heston. Heston from Columbia University, USA (1949). Originally developed as an inbred by Curtis (1920) at Columbia University Institute for Cancer Research, USA.
Received from Animal Resource Centre (ARC), Western Australia in 2023.
J Kanno , C Matsuoka, K Furuta, H Onodera, A Maekawa, Y Hayashi (1987) Glandular changes associated with the spontaneous interstitial cell tumor of the rat testes. 15(4):439-43.