Ellen Wiebe is a clinical professor in the department of family practice at the University of British Columbia. She advocates for access to medically assisted suicide and, after Canada legalized the practice, developed an organization called Hemlock AID to help patients and doctors understand their rights.

The Most Rev. Justin Welby is the archbishop of Canterbury, head of the Church of England. He has engaged a number of social issues since being installed in this role in March 2013, including poverty, climate change and medically assisted suicide.

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.