Jorge Merchan Price is the author of Medical Ethics: Abuses and Controversies. He leads the Medicos Azules movement, which opposed the legalization of physician-assisted suicide in Colombia.

Mark Pickering is the chief executive officer of the Christian Medical Fellowship, which serves Christians in the field of medicine in the United Kingdom.

Philip Nitschke is the founder of Exit International, which asserts that choosing the time and manner of one’s death is a human right. He supported and took part in medically assisted suicide in Australia before losing his medical registration as a result of his advocacy work.

David Clark is a professor of medical sociology at the University of Glasgow, where he leads the Glasgow End of Life Studies Group. He is also a vice president for Hospice UK and assisted the Scottish government as it drafted its framework for palliative and end of life care.

Liat Ayalon is deputy director of the school of social work at Bar-Ilan University in Israel, where she specializes in aging. She is also a member of the Bioethics Advisory Committee of the Israel Academy of Sciences and Humanities.

Jason Tippetts is the widower of Kara Tippetts, who became a high-profile opponent of medically assisted suicide during her battle with cancer. He is the lead pastor of Westside Church in Colorado Springs, Colo. Contact him through this online form.

The Rev. Paul Smith is a pastor, civil rights activist and patient advocate. He serves on the board of advisers for Compassion & Choices, which seeks to increase access to medically assisted suicide. He is the author of Facing Death: The Deep Calling to the Deep.

Daniel Sinclair is a visiting law professor and fellow with the Institute on Religion, Law and Lawyer’s Work at Fordham University. He is an expert on Jewish biomedical law.

Madison Shockley is the pastor of Pilgrim United Church of Christ in Carlsbad, Calif. He serves on Compassion and Choices’ Strategic Impact Committee, advocating for access to a full range of end-of-life care options.