1. Division of Cardiovascular Health and Disease, Department of Internal Medicine, Heart, Lung and Vascular Institute, University of Cincinnati, OH (S.S.).
2. Department of Biomedical Engineering and Medicine, University of Arizona, Tucson, AZ (J.C.T.).
3. College of Nursing (L.E.W.)
4. Department of Physiology and Cell Biology, College of Medicine, The Ohio State University, Columbus, OH (L.E.W.).