1. Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Orthopedics, Lund, Sweden
2. National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, GA, USA
3. Department of Pediatrics, Division of Medical Genetics, University of Utah, Salt Lake City, UT, USA
4. Spina Bifida Association, Arlington, Virginia, USA