Thesis (Ph. D. in Medical Sciences)--University of Tsukuba, (B), no. 1583, 2000.2.29Joint authors: Hideyuki Akaza, Yasuo Ohashi, Toshihiko KotakeOffprint. Originally published: Cancer, v. 86, no. 9, pp. 1818-1826, 1999Includes supplementary treatisesIncludes bibliographical reference