%0 Journal Article %B BMJ Open %D 2015 %F MSK %G eng %M 25667151 %P e007091 %T Effectiveness of a multifactorial intervention on preventing development of frailty in pre-frail older people: study protocol for a randomised controlled trial %V 5 %2 PMC4322196 %7 2015/02/11 %@ 2044-6055 (Electronic)