Emmanouil Tampakakis1, Chulan Kwon2. 1. Department of Medicine, Division of Cardiology, Johns Hopkins University, Baltimore, MD 21205, USA. Electronic address: etampak1@jhmi.edu. 2. Department of Medicine, Division of Cardiology, Johns Hopkins University, Baltimore, MD 21205, USA; Department of Biomedical Engineering, Department of Cell Biology, Cellular and Molecular Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA. Electronic address: ckwon13@jhmi.edu.