1 Department of Radiology, Weill Cornell Medical College, New York, New York, USA.
2 Department of Medicine and Center for Research on End-of-Life Care, Weill Cornell Medical College, New York, New York, USA.
3 Department of Radiation Oncology, Weill Cornell Medical College, New York, New York, USA.
4 Department of Radiology and Center for Research on End-of-Life Care, Weill Cornell Medical College, New York, New York, USA. Electronic address: pam2056@med.cornell.edu.