1 Division of General Internal Medicine, Section of Palliative Care and Medical Ethics, Pittsburgh, PA.
2 Division of Palliative Medicine, The Ohio State University Wexner Medical Center, Columbus, OH.
3 Department of Pulmonary and Critical Care Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA.
4 Division of Pulmonary, Critical Care and Sleep Medicine, The Ohio State University Wexner Medical Center, Columbus, OH.
5 UAB Center for Palliative and Supportive Care, University of Alabama at Birmingham Medical Center, Birmingham, AL. Electronic address: mdbarnett@uabmc.edu.