[CRASH--the first large randomized controlled study of head injuries].

CRASH (www.crash.lshtm.ac.uk) is already today the most extensive randomized controlled study of patients with head injuries which was implemented, but its completion and statistical evaluation will be possible only when it achieves the planned and necessary 20,000 enlisted patients. This calls for unselfish cooperation of physicians and nurses world-wide. In the Czech Republic so far six departments participate in the study and we would be glad if this number would increase substantially.