1. Department of Orthopedic Surgery, Sports Traumatology and Trauma Surgery, Städtisches Klinikum Wolfenbüttel (Wolfenbüttel Municipal Hospital), Alter Weg 80, 38302 Wolfenbüttel, Germany
2. Hospital for Children’s and Youth Medicine, Städtisches Klinikum Braunschweig (Braunschweig Municipal Hospital), Salzdahlumer Straße 90, 38126 Braunschweig, Germany