1. California State University–Stanislaus, Endangered Species Recovery Program, One University Circle, Turlock, California 95382, USA
2. University of California–Davis, School of Veterinary Medicine, Department of Medicine and Epidemiology, One Shields Avenue, Davis, California 95616, USA
3. California Department of Fish and Wildlife, Wildlife Investigations Laboratory, 1701 Nimbus Road, Rancho Cordova, California 95670, USA