Gasser A M, Love N E, Tate L P
Department of Anatomy, Physiological Sciences, and Radiology, College of Veterinary Medicine, North Carolina State Unviersity, Raleigh 27606, USA.
Vet Radiol Ultrasound. 2000 May-Jun;41(3):247-9. doi: 10.1111/j.1740-8261.2000.tb01487.x.