[1] Nanjing Univ, Div Cardiol, Nanjing Hosp 1, Nanjing 210006, Jiangsu, Peoples R China
[2] China United Med Univ, Bone Marrow Stem Cell Ctr, Beijing, Peoples R China
[3] Maanshan peoples Hosp, Dept Cardiol, Maanshan, Anhui, Peoples R China
[4] Cleveland Clin Fdn, Cleveland, OH 44195 USA