When Dr. Jack Kessler was invited to head up the Neurology Department at Northwestern, his focus was on using stem cells to help cure diabetes. Soon after his move to Chicago, his 15-year-old daughter, Allison, was paralyzed from the waist down in a skiing accident. After the accident, Dr. Kessler changed the focus of his research to using embryonic stem cells to cure spinal cord injuries. Through his story, the stem cell debate is brought to the...