Overview Safety Study of AMG 531 in Japanese Subjects With ITP Status: Completed Trial end date: 2006-11-01 Target enrollment: Participant gender: Summary The purpose of the study is to evaluate the efficacy of starting dose of AMG 531 as measured by platelet counts by cohort dose-escalation design. Phase: Phase 2 Details Lead Sponsor: Kyowa Hakko Kirin Company, LimitedKyowa Kirin Co., Ltd.