A 2006 review of literature identified the need for standardization of falls taxonomy due to the variation within research.[6] The Prevention of Falls Network Europe (ProFane) taxonomy for the definition and reporting of falls aimed at mitigating this problem.[7] ProFane recommended that a fall be defined as "an unexpected event in which the participants come to rest on the ground, floor, or lower level."[7] The ProFane taxonomy is currently used as a framework to appraise falls-related research studies in Cochrane Systematic Reviews.[8][9][10]