Savitz, David A. (2003). Health Effects of Electric and Magnetic Fields: Are We Done Yet?. Epidemiology, 14(1)
Although seeking causes of disease and looking for consequences of exposure are in many ways parallel research endeavors, there is a key distinction for epidemiologists. Health, not exposure, is the ultimate focus of our research. No matter how frustrated we may become in our search for causes of disease, we should not lose interest in that goal. Surveillance of the potential health impact of exposure has value, but only up to a point. Ideally, once a question has been raised regarding such a potential hazard, the research process would eventually convict or exonerate it, and policy makers could use that information to improve their decisions. However, such resolution is rather rare in practice, and in the absence of such a verdict, how do we know when to stop?
Savitz, David A.