1. Department of Animal Science, University of Connecticut, 17 Manter Rd, Unit 4040, Storrs, CT 06268, USA.
2. International Working Dog Registry, 4103 Hillglen Way, San Antonio, TX 78253, USA.
3. Guide Dogs New South Wales, 7-9 Albany Street, St Leonards, New South Wales, Australia.
4. Institute for System Genomics, 67 North Eagleville Road, Storrs, CT 06269-3003, USA.