Chang Donald S, Barack Bruce M, Lee Margaret H, Lee Hsin-Yi
Division of Cardiology, VA Greater Los Angeles Healthcare System, 11301 Wilshire Blvd. (111E), Los Angeles, CA 90073, USA.
AJR Am J Roentgenol. 2007 May;188(5):W428-30. doi: 10.2214/AJR.05.0636.