Royall, D. R., Palmer, R. F., Chiodo, L. K., Polk, M. J., Markides, K. S., & Hazuda, H. (2008). Clock-drawing Potentially Mediates Depression's Effect on Mortality: Replication in Three Cohorts. Int J Geriatr Psychiatry.

Royall, Donald R., Raymond F. Palmer, Laura K. Chiodo, Marsha J. Polk, Kyriakos S. Markides, und Helen Hazuda. "Clock-drawing Potentially Mediates Depression's Effect On Mortality: Replication in Three Cohorts." Int J Geriatr Psychiatry 2008.

Royall, Donald R., et al. "Clock-drawing Potentially Mediates Depression's Effect On Mortality: Replication in Three Cohorts." Int J Geriatr Psychiatry 2008.