@article{ SPONET-4039995, title = {Policy change eliminating body checking in non-elite ice hockey leads to a threefold reduction in injury and concussion risk in 11- and 12-year-old players}, journal = {British Journal of Sports Medicine}, volume = {50}, number = {1}, pages = {55-61}, author = {Black, A. M., Macpherson, A. K., Hagel, B. E., Romiti, M. A., Palacios-Derflingher, L., Kang, J., Meeuwisse, W. H., Emery, C. A.}, year = {2016}, url = {http://bjsm.bmj.com/content/50/1/55.abstract} doi = {10.1136/bjsports-2015-095103}, }