1. Veterans Affairs Palo Alto Health Care System, Palo Alto, California 94304, United States
2. Stanford Cardiovascular Institute, Stanford University, Stanford, California 94305, United States
3. Department of Chemistry, Stanford University, Stanford, California 94305, United States
4. Department of Cardiothoracic Surgery, Stanford University, Stanford, California 94305, United States
5. Fibralign Corporation, Union City, California 94587, United States
6. Department of Cardiovascular Sciences, Houston Methodist Research Institute, Houston, Texas 77030, United States