1. Survey of physicians who provide care for hypertension;Gallup Organization, Inc.,1986
2. Survey of hypertension patients who are on medications;Gallup Organization, Inc.,1986
3. How free care reduced hypertension in the Health Insurance Experiment;Keeler;JAMA,1985
4. Financial cost as an obstacle to hypertension therapy;Shulman;Am J Public Health,1986
5. Cost-effectiveness of interventions to prevent or treat coronary heart disease;Weinstein;Ann Rev Public Health,1985