This book is part of a book series called Twenty-First Century Medical Library .

There are 128 pages in this book. This book was published 2010 by Lerner Publications Co , U. S. .

Ana Maria Rodriguez, Ph. D. , was a research scientist in the biological and medical sciences for more than 20 years. She is currently a full-time writer with more than 65 magazine articles and three children's books to her credit.