1 Lille University Center, Jeanne de Flandres Hospital, Department of Pediatric Orthopedics, Avenue Eugène-Avinée, 59037 Lille cedex, France; Nord-de-France Lille University, Faculty of Medicine, 59000 Lille, France. Electronic address: canavese_federico@yahoo.fr.
2 Elly and Steven Hammerman, NYU School of Medicine, Pediatric Orthopaedic Surgery, NYU Langone Health/Hassenfeld Children's Hospital, 301 East 17th Street, New York, NY, 10003 USA; NYU Langone Health/Hassenfeld Children's Hospital, 301 East 17th Street, New York, NY, 10003 USA.
3 Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore; Department of Orthopaedic Surgery, National University Health System, Singapore, 1E Kent Ridge Road, NUHS Tower Block, Level 11, Singapore, 119228 Singapore.
4 Pediatric Orthopaedic Professor of China Medical University, Chief of Department of Pediatric Orthopaedics, Shengjing Hospital of China Medical University, No.36 Sanhao Street, Heping District, Shenyang City, Liaoning Province, 110004 PR China.
5 Department of Pediatric Orthopaedic, GuangZhou Women and Children's Medical Center, 9th JinSui Road, GuangZhou, 510623 PR China.
6 University College London, Great Ormond Street Institute of Child Health 30 Guildford St, London WC1N 3EH UK.