1. Department of Radiology, Indiana University School of Medicine, Indianapolis;
2. Wheldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana;
3. National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, India;
4. School of Engineering and Applied Sciences and Department of Human Evolutionary Biology, Harvard University, Cambridge, Massachusetts; and
5. Department of Biomedical Engineering and Division of Biokinesiology and Physical Therapy, The University of Southern California, Los Angeles, California