[1] Harvard Univ, Wyss Inst Biol Inspired Engn, Boston, MA 02115 USA
[2] Childrens Hosp, Dept Pathol, Vasc Biol Program, Boston, MA 02115 USA
[3] Childrens Hosp, Dept Surg, Vasc Biol Program, Boston, MA 02115 USA
[4] Harvard Univ, Sch Med, Boston, MA 02115 USA
[5] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA