[1] Univ Padua, Hepatobiliary & Liver Transplant Unit, I-35100 Padua, Italy
[2] Massachusetts Gen Hosp, Ctr Regenerat Med, Dept Surg, Boston, MA 02114 USA
[3] Natl Taiwan Univ Hosp, Dept Surg, Taipei, Taiwan
[4] MIT, Dept Engn Mech & Biol Engn, Cambridge, MA 02139 USA
[5] Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA