1. Teno JM, Nelson HL, Lynn J. Advance care planning: priorities for ethical and empirical research. Hastings Cent Rep. 1994;24:S32–6.
2. Emanuel LL, Barry MJ, Stoeckle JD, Ettelson LM, Emanuel EJ. Advance directives for medical care—a case for greater use. N Engl J Med. 1991;324:889–95.
3. Layson RT, Adelman HM, Wallach PM, Pfeifer MP, Johnston S, McNutt RA. Discussions about the use of life-sustaining treatments: a literature review of physicians’ and patients’ attitudes and practices. J Clin Ethics. 1994;5:195–203.
4. Loewy EH, Carlson RW. Talking, advance directives, and medical practice. Arch Intern Med. 1994;154:2265–7.
5. President’s Commission for the Study of Ethical Problems in Medicine and Biomedical and Behavioral Research. Patients who lack decision-making capacity. In: Deciding to Forgo Life-Sustaining Treatment: A Report on the Ethical, Medical, and Legal Issues in Treatment Decisions. Washington, DC: President’s Commission for the Study of Ethical Problems in Medicine and Biomedical and Behavioral Research; 1983:121–70.