[1] Ecole Polytech Fed Lausanne, Sch Life Sci, Inst Bioengn, CH-1015 Lausanne, Switzerland
[2] Ecole Polytech Fed Lausanne, Sch Engn, CH-1015 Lausanne, Switzerland
[3] Ecole Polytech Fed Lausanne, Sch Basic Sci, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
[4] Duke Univ, Dept Biomed Engn, Durham, NC 27708 USA
[5] Duke Univ, Ctr Biol Inspired Mat & Mat Syst, Durham, NC 27708 USA