a
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge
E-mail: karnik@mit.edu
;
Fax: +617-258-9346
;
Tel: +617-324-1155
b
Division of Biomedical Engineering, Department of Medicine, Center for Regenerative Therapeutics, Brigham and Women's Hospital, Harvard Medical School, Harvard Stem Cell Institute, Harvard-MIT Division of Health Sciences and Technology, Cambridge
E-mail: jkarp@rics.bwh.harvard.edu
;
Fax: +617-768-8338
;
Tel: +617-817-9174