Mark J. Estren, Ph.D., is a psychologist and medical journalist, former producer of "Report on Medicine" for CBS, author of numerous health and medicine articles for publications including The Washington Post, The Philadelphia Inquirer, The Miami Herald, Bottom Line/Personal, Bottom Line/Health, and others. Nationally known journalist and Pulitzer winner. Named one of the "People to Watch" by Fortune magazine. Executive producer (CBS and ABC News; also PBS). Major contributor to In a Word (Dell). Current contributor to The Washington Post. Current contributor to Bottom Line newsletter group. Current contributor to Journal of Animal Ethics.