From the Department of Radiology, University of Washington, Seattle, WA.
Received for publication February 23, 2012; and revision accepted March 13, 2012.
Conflicts of interest and sources of funding: none declared.
Reprints: David H. Lewis MD, Division of Nuclear Medicine, Department of Radiology, University of Washington, 1959 NE Pacific St, Seattle, WA 98195-7115. E-mail: email@example.com.