1. Washington University in St. Louis, School of Engineering and Applied ScienceDepartment of Biomedical EngineeringSt. Louis, Missouri, United States
2. University College London, Department of Medical Physics and Bioengineering, Malet Place Engineering BuildingLondon WC1E 6BT, United Kingdom
3. Washington University in St. Louis, School of Engineering and Applied Science, Department of Biomedical EngineeringSt. Louis, Missouri, United States