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Helen Carty,
Jane Ratcliffe

Consultant radiologist Consultant in paediatric intensive care Alder Hey Children's Hospital, Liverpool L12 2AP

EDITOR,—We wish to respond first to Stephen Leadbetter and colleagues. Our editorial was written to highlight the dangers of shaking and not to enter into a review of the literature on the role of shaking versus impact in causing the often fatal and frequently devastating brain injury suffered by these infants. We are familiar with the work of Duhaime et al and the model of trauma due to impact that they describe,1 but work in primates …