1. University of Nevada, Department of Health Physics and Diagnostic Sciences, Las Vegas, Nevada
2. University of California, Beckman Laser Institute and Medical Clinic, Irvine, California
3. University of Oslo, Pathology Clinic, Rikshospitalet-Radiumhospitalet HF Medical Center, Montebello,
4. University of California, School of Veterinary Medicine, Davis, San Bernardino, California