1. Animal Physiology Laboratory, The Institute of Physical and Chemical Research, Wako-shi, Saitama, 35101, Japan; Department of Microbiology and Immunology, Louisiana State University Medical Center in Shreveport, 1501 Kings Highway, PO Box 33932,
Shreveport, LA 71130-3932, USA
2. Animal Physiology Laboratory, The Institute of Physical and Chemical Research, Wako-shi, Saitama, 35101, Japan; Department of Biomedical Science, Faculty of Agriculture, The University of Tokyo, Bunkyo-ku, Tokyo, 113, Japan