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Mandel et al’s1 interesting literature review on trichloroethylene (TCE) exposure and non-Hodgkin’s lymphoma (NHL) has serious limitations.
First, there are three alternative descriptions of their stratification of group 1 studies: (1) population source (multiple industries vs only aerospace); (2) outcome (incidence vs mortality); and (3) location (European vs US). It would have been helpful to have specified a priori the interpretive advantages and disadvantages of each …
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