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Physiological recordings of contralateral acoustic stapedius reflex threshold and acoustic reflex decay in response to a 2000 Hz stimulus activator (A,B) and a 1000 Hz stimulus activator (C,D), and the acoustic stapedius reflex threshold at 4000 Hz (E) for an 8-year-old female with a blood mercury level of 40 μg/L living in gold mining areas of Ecuador where Hg is widely used in amalgamation.
