作者: Peter A. Singer

David Castle, Ph D, is Associate Professor in the Department of Philosophy at the University of Ottawa, Ontario, Canada. Cheryl Cline, Ph D, received her doctorate in philosophy from the University of Toronto in 2005. Her dissertation focused on animal welfare issues at the intersection of ethics, law, and politics. Abdallah S. Daar, MD, DPhil, is Professor of Public Health Sciences and Professor of Surgery, and Director of Ethics and Policy at the Mc Laughlin Centre for Molecular Medicine, University of Toronto. Charoula Tsamis is a research assistant at the Joint Centre for Bioethics, University of Toronto. Peter A. Singer, MD, is a Professor of Medicine at the University of Toronto and University Health Network, and a Senior Scientist at the Mc Laughlin Centre for Molecular Medicine, University of Toronto.