1. The Ponseti Clubfoot Treatment Centre, Department of Orthopedic Surgery and Rehabilitation, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, 01008 JPP, Iowa City, Iowa 52242, USA.
2. Barts and The London Children’s Hospital and NHS Trust, The Clubfoot/Talipes Clinic, Royal London Hospital, Whitechapel Road, London E1 1BB, UK.