En-bloc posterior vault distraction including the foramen magnum for Chiari I malformation in severe syndromic craniosynostosis: First cases and literature review. - Krause M; Griessenauer CJ; Gaggl A; Zeman-Kuhnert K; Gradl J; Wittig J (Journal of cranio-maxillo-facial surgery : official publication of the European Association for Cranio-Maxillo-Facial Surgery, 2026)