Environmental Health Perspectives, Vol. 101, Supplement 4: Environmental Epidemiology (Dec., 1993), pp. 187-191 (5 pages) Epidemiologic studies of the respiratory health effects of air pollution are ...

Recent research in the design of observational epidemiologic studies has been focused on determining which design is most efficient for controlling a potential confounding factor in the analysis of ...

Randomized clinical trials and large-scale, cohort studies continue to have a critical role in generating evidence in cardiovascular medicine; however, the increasing concern is that ballooning costs ...