[1] Harvard Med Sch, Massachusetts Gen Hosp, Cardiovasc Res Ctr, Dept Med,Div Cardiol, Charlestown, MA USA
[2] Massachusetts Gen Hosp, Dept Radiol, Neurovasc Res Lab, Charlestown, MA USA
[3] Tomsk Polytech Univ, RASA Ctr, Tomsk, Russia
[4] Massachusetts Gen Hosp, Dept Anesthesia Crit Care & Pain Med, Anesthesia Ctr Crit Care Res, Boston, MA 02114 USA
[5] Massachusetts Gen Hosp, Dept Radiat Oncol, Edwin L Steele Lab, Boston, MA 02114 USA
[6] Univ Tubingen, Interfac Inst Biochem, Tubingen, Germany