How effective are pictograms in communicating risk to patients who drive under the influence of medicines?

Monteiro, S.P., Huiskes, R., Weert, J. van, Dijk, L. van, Gier, J. de. How effective are pictograms in communicating risk to patients who drive under the influence of medicines? Pharmacoepidemiology and Drug Safety: 2011, 20(suppl. 1) S218. Abstract. 27th International Conference on Pharmacoepidemiology and Therapeutic Risk Management, 14-17 Augustus 2011, Chicago.