From 1974 to 2006, he spent several months each in Africa where he developed a humane chimpanzee research center, which played a significant role in his professional life. In 2010, Dr. Prince wrote a memoir titled �The Poetry of Life,� which detailed the ups and downs of life in science as well as the pleasures of living in Europe, Japan and Africa. Watch the Hep B Free Philadelphia Video from First Citywide Hospital Testing Day for HBV!