Affiliation: | 1)Animal Physiology Research Unit, National Institute of Agrobiological Sciences, Ibaraki 305-0901, Japan;2)NARO Tohoku Agricultural Research Center, Iwate 020-0198, Japan;3)Laboratory of Veterinary Physiology, Iwate University, Iwate 020-8550, Japan;4)Laboratory of Reproductive Physiology, Okayama University, Okayama 700-8530, Japan |