 0.0000) than those in the low As group (n = 00) at 0 kHz (mean = 0.00 dB), 0 kHz (mean = 00.00 dB) and 00 kHz (mean = 00.00 dB) ([Fig 0B](#pone.0000000.g000){ref-type="fig"}).  ![Association between hearing thresholds and As levels in biological samples 