Affiliation: | 1.Department of Orthopedics and Pediatric Orthopedics, Medical University of Lodz, Lodz, Poland ;2.Department of Orthopedics, Nemours/Alfred I. duPont Hospital for Children, 1600 Rockland Road, Wilmington, DE USA ;3.Department of Pediatric Orthopedics, Seattle Children’s Hospital, Seattle, Washington USA |