[1] Univ Calif San Francisco, Dept Surg, San Francisco, CA USA
[2] Univ Calif San Francisco, Dept Cell & Tissue Biol, San Francisco, CA USA
[3] Univ Calif San Francisco, Dept Anat, San Francisco, CA USA
[4] Univ Calif San Francisco, Diabet Ctr, San Francisco, CA USA
[5] Univ Calif San Francisco, Eli & Edythe Broad Ctr Regenerat Med, San Francisco, CA USA
[6] Univ Calif San Francisco, Dept Bioengn & Therapeut Sci, San Francisco, CA USA