[文献書誌] Kondo, K., Kojima, C., Watanabe, C., Shimizu, K., Itoh, M., Udono, T., Taya, K.: "Endocrinological comparison of activin A secretion during pregnancy and early lactation in Japanese monkeys, chimpanzees, and humans."Endocrine. 22(3). 239-243 (2003)