E. Harvey

Printed educational materials: effects on professional practice and health care outcomes.

N Freemantle, J M Grimshaw, N. Freemantle, 2000, The Cochrane database of systematic reviews.

Local opinion leaders: effects on professional practice and health care outcomes.

N. Freemantle, J. Grimshaw, M. O’Brien, 2007, The Cochrane database of systematic reviews.