Dena S. Davis is a professor at the Cleveland-Marshall College of Law at Cleveland State University in Cleveland. She wrote the article “Informed Consent for Stem Cell Research in the Public Sector” for the Journal of the American Medical Women’s Association.

Jefferson McMahan is a professor of philosophy at Rutgers University. He wrote the article “Cloning, Killing and Identity” for the Journal of Medical Ethics.

Read a June 22, 2005, Christian Science Monitor story on the debate stem cell research is sparking in Muslim countries.

George Daley is a stem cell biologist with the Whitehead Institute and Harvard Medical School. He supports a bill that would allow embryonic stem cell research in Massachusetts.

Thomas Anthony Shannon is professor of religion and ethics at the Worcester Polytechnic Institute in Worcester, Mass. He wrote Made in Whose Image?: Genetic Engineering and Christian Ethics (Humanity Books, 2000) and co-wrote New Genetic Medicine: Theological and Ethical Reflections (Rowman & Littlefield, 2003).

The Rev. John Langan is a professor of philosophy at Georgetown University in Washington, D.C. He wrote the entry “Stem Cell Research and Religious Freedom” for Stem Cell Research: New Frontiers in Science and Ethics.

John Hyde Evans is a sociologist at the University of California, San Diego. He wrote Playing God?: Human Genetic Engineering and the Rationalization of Public Bioethical Debate and The History and Future of Bioethics: A Sociological View.

Michael M. Mendiola was associate professor of Christian ethics for the Graduate Theological Union in Berkeley, Calif. He wrote the article “Human Embryonic Stem Cells: Possible Approaches from a Catholic Perspective” for The Human Embryonic Stem Cell Debate (MIT Press, 2001). Mendiola passed away in 2008.

Dr. Irving Weissman is head of the stem cell research program at Stanford University in Palo Alto, Calif. He opposes an effort to repeal California’s law legalizing embryonic stem cell research.