Balion CM, Raina PS, Wolfson C, Kirkland SA, Keys JL, Griffith LE, Pelletier A, Uniat J, McQueen MJ. Feasibility of biological specimen collection for the Canadian longitudinal study on aging (CLSA) biorepository. Can J Aging. 2009 Sep;28(3):261-74. doi: 10.1017/S0714980809990080. PMID: 19860981.