^aDepartment of Genetics, University of Alabama

^bPediatric Radiology, Children's Health System, Birmingham, Alabama, USA

Correspondence to Maria Descartes, MD, Associate Professor of Genetics and Pediatrics, UAB Department of Genetics, KAUL 210, 1530 3rd Avenue South, Birmingham, AL 35294-0024, USA

Tel: +1 205 934 9576; fax: +1 205 975 6389;

e-mail: [email protected]

Received 30 July 2008 Accepted 19 February 2009