1. Hoffman-La Roche Inc., Department of Laboratory Animal Resources, 340 Kingsland Street, Nutley, NJ 07110-1199
2. Charles River Laboratories, Professional Services, 251 Ballardvale Street, Wilmington, MA 01887, USA
3. The Pennsylvania State University, The Milton S. Hershey Medical Center, Department of Comparative Medicine, 500 University Drive, Hershey, PA 17033, USA