1. Medically Advanced Devices Laboratory, Center for Medical Devices, Department of Mechanical and Aerospace Engineering, Jacobs School of Engineering, and the Department of Medicine, School of Medicine, University of California San Diego, 9500 Gilman Drive MC0411, La Jolla, California 92093, United States
2. Université de Lorraine, Centre national de la recherche scientifique (CNRS), Institut Jean Lamour, F-54000 Nancy, France
3. Materials Science and Engineering Program, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States