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Hargreaves R.J., Evans J. G., Janota I., Magos L. he never returned to work and died in 1984. No histological changes relevant to mercury intoxication were found in the brain, but staining by Danscher & Schroeder's method for mercury showed many positively staining lysosomal dense bodies in a large proportion of nerve cells, and the presence of mercury was confirmed by elemental X–ray analysis. The mercury content of the brain was increased, much of it being present in colloidal form.
Hargreaves et al. (Thu,) studied this question.