[1] Duke Univ, Med Ctr, Durham, NC 27708 USA
[2] Duke Clin Res Inst, Durham, NC 27705 USA
[3] Mechron Diagnost & Monitoring Res, Mounds View, MN USA
[4] Lankenau Heart Inst, Philadelphia, PA USA
[5] Jefferson Med Coll, Philadelphia, PA USA
[6] Valley Hlth Syst, Ridgewood, NJ USA
[7] US FDA, Div Cardiovasc & Renal Prod, Rockville, MD 20857 USA
[8] Columbia Univ, Div Cardiol, Med Ctr, New York, NY USA
[9] VA Palo Alto Hlth Care Syst, Palo Alto, CA USA
[10] Stanford Univ, Palo Alto, CA 94304 USA
[11] eRes Technol Inc ERT, Philadelphia, PA USA
[12] Bristol Myers Squibb, Princeton, NJ USA
[13] Stanford Univ, Stanford, CA 94305 USA