Clifford Susan M, Guerra Sheilah Mae, Mangion Judy R
Division of Cardiology, Department of Medicine, North Shore University Hospital, New York University School of Medicine, 300 Community Drive, Manhasset, NY 11030, USA.
Echocardiography. 2003 Feb;20(2):201-2. doi: 10.1046/j.1540-8175.2003.03001.x.