原文見:Schonnop R,Yang Y,Feldman F,et al.Prevalence of and factors associated with head impact during falls in older adults in long-term care[J].CMAJ,2013,185(17)E803-E810.doi:10.1503/cmaj.130498.published at http://www.cmaj.ca/content/early/2013/10/07/cmaj.130498.