Author's Organization:National Institute of Animal Health National Institute of Animal Health Shimane Institute of Animal Health National Institute of Animal Health National Institute of Animal Health Institute of Medical Science, The University of Tokyo Institute of Medical Science, The University of Tokyo Department of Veterinary Publit Health, Faculty of Agriculture, Tottori University
Published: August 15, 1991Received: October 30, 1990Available on J-STAGE: February 15, 2008Accepted: May 16, 1991
Advance online publication: -
Revised: -