1. Division of Cardiology, Department of Internal Medicine, McGovern Medical School, The University of Texas Health Science at Houston, 1881 East Road, Houston, TX 77054, USA
2. Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, Virginia, USA
3. Department of Bio-Mechatronic Engineering, Sungkyunkwan University, Suwon, Gyeonggi, Korea
4. Roy J. Carver Department of Biomedical Engineering, The University of Iowa, Iowa City, IA, USA