Ezekiel Emanuel, MD/PhD, Chair of the Department of Clinical Bioethics at the Warren G. Magnuson Clinical Center, National Institutes of Health, et al. wrote in their 1998 article, "The Practice of Euthanasia and Physician-Assisted Suicide in the United States: Adherence to Proposed Safeguards and Effects on Physicians," that appeared in the Journal of the American Medical Association:

“A total of 355 oncologists…were interviewed on euthanasia and PAS [physician-assisted suicide]. On 2 screening questions, 56 oncologists (15.8%) reported participating in euthanasia or PAS.”