1. Division of Pediatric Orthopaedics, Department of OrthopaedicsRainbow Babies and Children's HospitalCleveland Ohio
2. Texas A&M Health Science Center, School of MedicineTemple Texas
3. Center for Excellence in Hip DisordersTexas Scottish Rite Hospital for ChildrenDallas Texas
4. Department of Orthopaedics, Southwestern Medical CenterUniversity of TexasDallas Texas