^a Orthopedic and Traumatology Department, IRCCS Istituto Giannina Gaslini, Via Gerolamo Gaslini 5, 16147, Genoa, Italy 

^b Department of Spine Surgery, Hôpitaux Universitaires de Strasbourg, Université de Strasbourg, 1 Avenue Molière, 67200 Strasbourg, France 

^c Department of Paediatric Orthopaedics, Fuzhou Second General Hospital, 47th Shangteng Road of Cangshan District, Fuzhou 350007, China 

^d Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong 

^e University of Montpellier, Faculty of Medicine, 34000 Montpellier, France 

^f Childrens' Orthopaedic Centre, Bobby Apartments Lady, Jamshedi Roda, Mahim, Mumbai, 400016, India 

^g Department of Orthopaedics and Traumatology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland 

^h Department of Pediatric Orthopedics, Shengjing Hospital of China Medical University, 110004 Shenyang, China 

ⁱ Department of Pediatric Surgery, Jeanne de Flandre’s Hospital, Lille University Hospital, Avenue Eugene Avinée, 59000, Lille, France 

^j Department of Pediatric Orthopedics, Hospital Universtari Son Espases and University Illes Balears, Palma de Mallorca, Spain 

^k Children's Orthopaedics and Spine Center, Ankara, Turkey 

^l DISC-Dipartimento di Scienze Chirurgiche e Diagnostiche Integrate, University of Genova, Viale Benedetto XV N°6, 16132, Genova, Italy