Author's Organization:Department of Infectious Disease, School of Veterinary Medicine, Azabu University Department of Infectious Disease, School of Veterinary Medicine, Azabu University Department of Infectious Disease, School of Veterinary Medicine, Azabu University
Published: August 15, 1988Received: August 10, 1987Available on J-STAGE: February 13, 2008Accepted: March 29, 1988
Advance online publication: -
Revised: -