1. Small Animal Clinic, Institute of Veterinary Medicine, Georg-August University of Göttingen, 37077 Göttingen, Germany
2. Functional Imaging Laboratory, German Primate Center, Leibniz Institute for Primate Research, 37077 Göttingen, Germany
3. Pathology Unit, German Primate Center, Leibniz Institute for Primate Research, 37077 Göttingen, Germany