WalstonJFriedLP. Frailty and the older man. Med Clin North Am1999; 83(5): 1173–1194.
2.
FriedLPTangenCMWalstonJet al.Frailty in older adults: Evidence for a phenotype. J Gerontol A Biol Sci Med Sci2001; 56(3): M146–M156.
3.
FriedLP. Conference on the physiologic basis of frailty. April 28, 1992, Baltimore, Maryland, U.S.A. Introduction. Aging (Milano)1992; 4(3): 251–252.
4.
MitnitskiABMogilnerAJRockwoodK. Accumulation of deficits as a proxy measure of aging. Scientific World Journal2001; 1: 323–336.
5.
StammersANKehlerDSAfilaloJet al.Protocol for the PREHAB study-Pre-operative Rehabilitation for reduction of Hospitalization After coronary Bypass and valvular surgery: A randomised controlled trial. BMJ Open2015; 5(3): e007250–e007250.
6.
RockwoodKSongXMacKnightCet al.A global clinical measure of fitness and frailty in elderly people. CMAJ2005; 173(5): 489–495.
7.
RolfsonDBMajumdarSRTsuyukiRTet al.Validity and reliability of the Edmonton Frail Scale. Age Ageing2006; 35(5): 526–529.