Identifying a cut-off point for normal mobility: a comparison of the timed “Up and Go” test in community-dwelling and institutionalised elderly women. - Bischoff,HA.; Stähelin,HB.; Monsch,AU.; Iversen,MD.; Weyh,A.; Dechend,M von.; Akos,R.; Conzelmann,M.; Dick,W.; Theiler,R. (Age Ageing, 2003)