[1] Stanford Univ, Sch Med, Stanford Cardiovasc Inst, Stanford, CA USA
[2] Stanford Univ, Sch Med, Div Cardiovasc Med, Stanford, CA USA
[3] Stanford Univ, Dept Surg, Div Vasc Surg, Sch Med, Stanford, CA USA
[4] Greenstone Biosci, Palo Alto, CA 94305 USA