Miyamae, Tetsuhisa; Hashizume, Hirokazu; Ogawa, Tadashi; Okayama, Toru; Nukui, Eriko; Oshima, Kouichi; Morikawa, Tadanori; Hagiwara, Masaki Arzneimittel-Forschung/Drug Research, 1997 , vol. 47, # 1 p. 13 - 18