Please refer in your paper to the NBRP-Rat resource, which you received from us.
The example often used is:
We are thankful to the National BioResource Project - Rat
(http://www.anim.med.kyoto-u.ac.jp/NBR/) for providing rat strains (the strain
(the strain name) rats were supplied by the National BioResource Project - Rat,
Kyoto University (Kyoto, Japan).
Thank you very much for your cooperation.