RT Journal Article SR Electronic T1 Summary and agreement statement of the 2nd International Conference on Concussion in Sport, Prague 2004 JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP i78 OP i86 DO 10.1136/bjsm.2005.018614 VO 39 IS suppl 1 A1 McCrory, P A1 Johnston, K A1 Meeuwisse, W A1 Aubry, M A1 Cantu, R A1 Dvorak, J A1 Graf-Baumann, T A1 Kelly, J A1 Lovell, M A1 Schamasch, P YR 2005 UL http://bjsm.bmj.com/content/39/suppl_1/i78.abstract AB In November 2001, the 1st International Symposium on Concussion in Sport was held in Vienna, Austria to provide recommendations for the improvement of safety and health of athletes who suffer concussive injuries in ice hockey, football (soccer), and other sports. The 2nd International Symposium on Concussion in Sport was organised by the same group and held in Prague, Czech Republic in November 2004. It resulted in a revision and update of the Vienna consensus recommendations, which are presented here.