A crosswalk for the conversion of scores between the Neck Disability Index (NDI) and the neck version of the Core Outcome Measures Index (COMI-neck). - Mannion AF; Fekete TF; Loibl M; Aghayev E; Valente Aguiar P; Haschtmann D (European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2026)