[1] Univ Waterloo, Sch Optometry, Graham Trust Res Chair Hlth Informat, Waterloo, ON N2L 3G1, Canada
[2] Lawson Hlth Res Inst, London, ON, Canada
[3] St Josephs Healthcare London, Specialized Geriatr Serv, London, ON, Canada
[4] Univ Western Ontario, Div Geriatr Med, Lawson Hlth Res Inst, London, ON, Canada