1. Inova Center for Thrombosis Research and Drug Development, Inova Heart and Vascular Institute, Falls Church, VA (P.A.G.).
2. British Heart Foundation Centre for Cardiovascular Sciences, University of Edinburgh, United Kingdom (K.A.A.F.).
3. Sinai Center for Thrombosis Research, Sinai Hospital of Baltimore, MD (U.S.T.).
4. Laboratory for Clinical Thrombosis and Hemostasis, Departments of Internal Medicine and Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University Medical Center, Netherlands (H.t.C.).
5. Thrombosis and Atherosclerosis Research Institute and McMaster University, Hamilton, Canada (J.I.W.).