TY - JOUR A1 - Walston, J. A1 - Hadley, E.C. A1 - Ferrucci, L. A1 - Guralnik, J.M. A1 - Newman, A.B. A1 - Studenski, S.A. A1 - Ershler, W.B. A1 - Harris, T. A1 - Fried, L.P. T1 - Research agenda for frailty in older adults: Toward a better understanding of physiology and etiology: Summary from the American Geriatrics Society/National Institute on Aging Research conference on frailty in older adults Y1 - 2006 DO - 10.1111/j.1532-5415.2006.00745.x VL - 54 IS - 6 ER -