Dr. Julien I. E. Hoffman has 40 years of experience teaching biostatistics to fellows in various medical fields. For about 15 years, Dr. Hoffman was a member of the Biostatistics Committee of the University of California and he still does statistical reviews for all the journals published by the American Heart Association. The author has published 214 articles in journals, 164 chapters in books, 109 abstracts, and has edited 9 books.