J. P. Barile, Thompson, W. W., Zack, M. M., Krahn, G. L., Horner-Johnson, W., and Haffer, S. C.,
“Activities of daily living, chronic medical conditions, and health-related quality of life in older adults.”,
The Journal of ambulatory care management, vol. 35, no. 4, pp. 292-303, 2012.