■ Avec ROTER D. L., JOHNSON R. L. et al., « Patient-centered communication, ratings of care, and concordance of patient and physician race », in Annals of Internal Medicine, vol. 139, no 11, déc. 2003 ; avec BEACH M. C., JOHNSON R. L. et al., « Delving below the surface. Understanding how race and ethnicity influence relationships in health care », in Journal of General Internal Medicine, vol. 21, supp. 1, 2006.