作者单位:Institute of Macromolecular Compounds of Russian Academy of Sciences, Bolshoy pr. 31, St. Petersburg 199004, Russia[1]Harvard Univ, Sch Med, Boston, MA 02215 USA[2]Harvard Univ, Sch Med, Joslin Diabet Ctr, Div Res, Boston, MA 02215 USA[3]Brigham & Womens Hosp, Dept Med, NMR Lab Physiol Chem, Div Cardiovasc Med, Boston, MA 02215 USA[4]