From the Tulane Center for Cardiovascular Health and the Department of Epidemiology (L.R., W.C., S.R.S., M.S., H.W., A.T., G.S.B.), Tulane University Health Sciences Center, New Orleans, La; and the Department of Ultrasound Diagnostics (L.R.), the First Affiliated Hospital, School of Medicine, Xi’an Jiaotong University, Xi’an, China. (At 2009-03)