Mechanism of metastasis of gastric cancer, from the viewpoint of basement membrane degradative enzyme - Yoshino, Keiichi; Kubochi, Kiyoshi; Okazaki, Isao; Otani, Yoshihide; Matsuyama, Shigeo; Suzuki, Humio; Fukase, Tatsu; Aizawa, Kenichiro; Matsui, Hideo; Shimada, Atsushi; Ishibiki, Kyuya; Abe, Osahiko (Nippon Shokaki Geka Gakkai zasshi, 1991)