Prospective observational study to assess the performance accuracy of clinical decision rules in children presenting to emergency departments with possible cervical spine injuries: the Study of Neck Injuries in Children (SONIC)

N. Phillips, G. N. Askin, G. A. Davis, S. O'Brien, M. L. Borland, A. Williams, A. Kochar, B. John-Denny, S. Watson, S. George, M. Davison, S. Dalziel, E. Tan, S.-L. Chong, S. Craig, A. Rao, S. M. Donath, C. J. Selman, S. Goergen, C. L. Wilson, S. Singh, N. Kuppermann, J. C. Leonard and F. E. Babl