RT Journal Article SR Electronic T1 Challenges moving forward with economic evaluations of exercise intervention strategies aimed at combating cognitive impairment and dementia JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 470 OP 472 DO 10.1136/bjsm.2010.077990 VO 45 IS 6 A1 Jennifer C Davis A1 Ging-Yuek R Hsiung A1 Teresa Liu-Ambrose YR 2011 UL http://bjsm.bmj.com/content/45/6/470.abstract AB