Overview A Phase 1 Study of XL019 in Adults With Polycythemia Vera Status: Terminated Trial end date: 2009-02-01 Target enrollment: Participant gender: Summary The purpose of this study is to evaluate the safety and tolerability of the JAK2 inhibitor XL019 administered orally in adults with Polycythemia Vera. Phase: Phase 1 Details Lead Sponsor: Exelixis