1. Department of Biomedical Engineering, Duke University, 136 Hudson Hall, Box 90281, Durham,
North Carolina 27708, United States
2. Center for Biologically Inspired
Materials and Material Systems, Duke University, Box 90300, Durham, North Carolina 27708, United States
3. Center for Interventional Oncology,
Clinical Center, National Cancer Institute, National Institutes of Health, 9000 Rockville Pike, Bethesda,
Maryland 20892, United States
4. Department of Mechanical Engineering
and Materials Science, Duke University,
Box 90300, Durham, North Carolina 27708, United States