1. Department of Toxicology, Oregon State University, Corvallis, Oregon 97331, United States
2. Department of Environmental Health Sciences, Columbia University, New York, New York 10032, United States
3. Animal Endocrine Clinic, 21 West 100th Street, New York, New York 10025, United States
4. Carlson College of Veterinary Medicine, Oregon State University, Corvallis, Oregon 97331, United States
5. New York Cat Hospital, 143 Freedom Place, New York, New York 10069, United States