From the McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore. Address reprint requests to Dr. Dietz at the McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, 733 N. Broadway St., Baltimore, MD 21205, or at [email protected].
Disclosure forms provided by the author are available with the full text of this article at NEJM.org.
New England Journal of Medicine 363(9):p 852-863, August 26, 2010. | DOI: 10.1056/NEJMra0907180
