1 Department of Cardiology, Keio University School of Medicine, Tokyo, Japan.
2 Department of Rehabilitation and Regenerative Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York City, NY, United States.
3 Department of Molecular Pharmacology and Therapeutics, Vagelos College of Physicians and Surgeons, Columbia University, New York City, NY, United States.
4 Columbia Stem Cell Initiative, Vagelos College of Physicians and Surgeons, Columbia University, New York City, NY, United States.
5 Department of Cardiovascular Regenerative Medicine, Osaka University Graduate School of Medicine, Suita, Japan.