1. Tianjin Key Laboratory on Technologies Enabling Development of; Clinical Therapeutics and Diagnostics; School of Pharmacy; Tianjin Medical University; Tianjin 300070 P.R. China
2. Institute of Materials and Environmental Chemistry; Hungarian Academy of Sciences and; Department of Physics; Budapest University of Technology and Economics; Budafoki ut 8 1111 Budapest Hungary
3. Department of Biological Chemistry and Pharmacology; College of Medicine; The Ohio State University; Columbus OH 43210 USA
4. Center for Biomedical EPR Spectroscopy and Imaging; The Davis Heart and Lung Research Institute; Division of Cardiovascular Medicine; Department of Internal Medicine; The Ohio State University; Columbus OH 43210 USA