1. Illness in the home: a study of 25,000 illnesses in a group of Cleveland families;Dingle,1964
2. Rhinovirus infections in an industrial population. I. The occurrence of illness;Gwaltney;N Engl J Med,1966
3. HHS: Vital Health Statistics 10. Washington, D.C., 1986.
4. Expense of physician care spurs OTC, self-care market;Rosenthal;Drug Topics,1988
5. Over-the-counter medication use among US preschool-age children;Kogan;JAMA,1994