[1] Univ Massachusetts, Med Ctr, Ctr Plantelet Funct Studies, Dept Pediat, Worcester, MA 01655 USA
[2] Univ Massachusetts, Med Ctr, Working Grp Aspirin Resistance, Int Soc Thrombosis & Haemostasis, Worcester, MA 01655 USA
[3] Univ Milan, Dept Med Surg & Dent, Unit Hematol & Thrombosis, Osped San Paolo, I-20122 Milan, Italy
[4] Univ Western Australia, Sch Med & Pharmacol, Dept Haematol, Royal Perth Hosp, Nedlands, WA 6009, Australia
[5] Sinai Hosp, Sinai Ctr Thrombosis Res, Baltimore, MD 21215 USA
[6] Cleveland Clin Fdn, Dept Clin Pathol, Cleveland, OH 44195 USA
[7] Scripps Res Inst, Dept Mol & Expt Med, La Jolla, CA USA
[8] Univ Roma La Sapienza, Dept Expt Med & Pathol, Rome, Italy
[9] Catholic Univ, Ctr High Technol Res & Educ Biomed Sci, Campobasso, Italy
[10] Temple Univ, Sch Med, Thrombosis Res Ctr, Philadelphia, PA 19122 USA