Dr. Smith is a professor of medicine and pediatrics at the University of Iowa School of medicine and director of the Institute of human genetics at the University of Iowa. Dr. Smith has been studying Dense Deposit Disease (DDD) for more than ten years, and has published 15 research articles in the world's top professional journals. The DDD study and treatment of Dr. Smith published in 2007 and 2011, the latest progress of the authority of the "New approaches to the paper treatment of dense deposit disease" and "Dense deposit disease", he has been fully explained the rare disease in the study of international authoritative position. Dr. Smith relies on the superb skills and research fruits received wide acclaim, the doctors and patients with. In 2013, Dr. Smith was named “ &rdquo, America's best doctor; (America’ s Best Doctors).