the relationship of the time in which refineries located in the circuit had been involved
to the epidemic curve, the results were evident. Only the refinery dealing with oil
containing the chemical markers of derivatives of glycerol was likely to have been
involved in the intoxication since the beginning through only two oil batches.
la Paz M, Philen RM, Schurz HH, et al. Epidemiologic evidence for a new class of compounds
associated with Toxic Oil Syndrome. Epidemiology 1999; 10(2): 130-134.