Dr. Michael A. Williams is medical director of the LifeBridge Health Brain & Spine Institute in Baltimore. He is former co-chairman of the Johns Hopkins Hospital Ethics Committee. His interest areas include end-of-life care and the ethical issues of organ donation, of intracranial pressure and of hydrocephalus.

Dennis McCann, Professor Emeritus of Bible and Religion at Agnes Scott College in Decatur, Ga., has written about liberation theology and business ethics.

Dr. Robert M. Arnold is director at the University of Pittsburgh School of Medicine’s Institute for Doctor-Patient Communication. Arnold teaches physician leaders how to educate peers to better communicate regarding ethical, psychosocial and existential issues at the end of life.

Dr. Alexandra Cist, board-certified in internal medicine, pulmonary medicine and critical care medicine, is on staff at Massachusetts General Hospital, where she serves on the ethics task force and other ethics committees.

Kenneth Surin, professor of religion, literature and critical theory at Duke University, has written about liberation as a critical term of religious study and the relevance of Marxism.

Lynn Pasquerella is president of Mount Holyoke College in Massachusetts and has written about medical ethics.  She formerly chaired the University of Rhode Island institutional review board.

Lorine Getz is a scholar based in Hilton Head, S.C., and a retired professor of religion, culture, ethics and spirituality and the arts at the University of North Carolina at Charlotte. She co-edited Struggles for Solidarity: Liberation Theologies in Tension (Fortress Press, 1991).

The Rev. Iain Maclean, associate professor of Western religious thought, philosophy and religion at James Madison University in Harrisonburg, Va., has written about liberation theologians and the struggle for democracy in Brazil.

Arthur Pressley, associate professor of psychology and religion at Drew University in Madison, N.J., has written about liberation theology, pastoral care and the spirituality of violence.